[devtools] Clean up HTML

This patch simplifies the existing charset <meta> tags (saving
45 bytes per file) and removes redundant type="text/javascript"
attributes from <script> elements (saving 46 bytes per file).

Overall, this patch saves 728 useless bytes (91 bytes * 8 files).

https://mathiasbynens.be/notes/html5-levels#simplified-syntax

Change-Id: I87446df4335c6f1e41d0a8783dd5d459b82c1057
Reviewed-on: https://chromium-review.googlesource.com/c/1472490
Auto-Submit: Mathias Bynens <[email protected]>
Commit-Queue: Mathias Bynens <[email protected]>
Commit-Queue: Joel Einbinder <[email protected]>
Reviewed-by: Joel Einbinder <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#632133}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 20b6d50ce5c4080596fa8388806b95c28c294479
diff --git a/front_end/devtools_app.html b/front_end/devtools_app.html
index 76b4116..81b6645 100644
--- a/front_end/devtools_app.html
+++ b/front_end/devtools_app.html
@@ -6,11 +6,11 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
     <meta name="referrer" content="no-referrer">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="devtools_app.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="devtools_app.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/inspector.html b/front_end/inspector.html
index c4da1f5..b5d6f04 100644
--- a/front_end/inspector.html
+++ b/front_end/inspector.html
@@ -6,11 +6,11 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
     <meta name="referrer" content="no-referrer">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="inspector.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="inspector.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/integration_test_runner.html b/front_end/integration_test_runner.html
index f982e1b..ca7cc52 100644
--- a/front_end/integration_test_runner.html
+++ b/front_end/integration_test_runner.html
@@ -6,10 +6,10 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="integration_test_runner.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="integration_test_runner.js"></script>
 </head>
 <body id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/js_app.html b/front_end/js_app.html
index ef077a4..7105918 100644
--- a/front_end/js_app.html
+++ b/front_end/js_app.html
@@ -6,11 +6,11 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
     <meta name="referrer" content="no-referrer">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="js_app.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="js_app.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/ndb_app.html b/front_end/ndb_app.html
index aca9d95..ac0dee1 100644
--- a/front_end/ndb_app.html
+++ b/front_end/ndb_app.html
@@ -6,11 +6,11 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
     <meta name="referrer" content="no-referrer">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="ndb_app.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="ndb_app.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/node_app.html b/front_end/node_app.html
index 71c675c..05aa910 100644
--- a/front_end/node_app.html
+++ b/front_end/node_app.html
@@ -6,11 +6,11 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
     <meta name="referrer" content="no-referrer">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="node_app.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="node_app.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/toolbox.html b/front_end/toolbox.html
index 267356c..c48ad36 100644
--- a/front_end/toolbox.html
+++ b/front_end/toolbox.html
@@ -6,10 +6,10 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' ">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="toolbox.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="toolbox.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>
diff --git a/front_end/worker_app.html b/front_end/worker_app.html
index ad332c5..e5827b5 100644
--- a/front_end/worker_app.html
+++ b/front_end/worker_app.html
@@ -6,11 +6,11 @@
 <!doctype html>
 <html lang="en">
 <head>
-    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <meta charset="utf-8">
     <meta http-equiv="Content-Security-Policy" content="object-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://chrome-devtools-frontend.appspot.com">
     <meta name="referrer" content="no-referrer">
-    <script type="text/javascript" src="Runtime.js"></script>
-    <script type="text/javascript" src="worker_app.js"></script>
+    <script src="Runtime.js"></script>
+    <script src="worker_app.js"></script>
 </head>
 <body class="undocked" id="-blink-dev-tools"></body>
 </html>