[Extension ServiceWorkers] Allow service worker registration

change SchemeisHTTPOrHTTPS checks to OriginCanAccessServiceWorker in service worker files.
Service Workers require a secure origin, such as HTTPS.  chrome-extension:// pages are not HTTP/HTTPS, but are secure so this change allows extensions to register a Service Worker.

Added an OriginCanAccessServiceWorker function in origin_util and replaced the SecureSchemeAndOriginSet with CustomSchemeAndOriginSet to add service worker schemes.

Also included a function for extensions to have response codes of 200 in extension protocols file.
A response code in the 200s (successful HTTP request) is required to install the Service Worker
(ServiceWorkerWriteToCacheJob::OnResponseStarted, line 630).  Extensions returned a response code of -1 because it was not overridden.  A GetResponseCode function was written in extensions_protocol.cc in the URLRequestExtensionJob class.

Added testing for fetch events.

BUG=501569

Review URL: https://codereview.chromium.org/1192013003

Cr-Commit-Position: refs/heads/master@{#340908}
diff --git a/chrome/browser/extensions/service_worker_apitest.cc b/chrome/browser/extensions/service_worker_apitest.cc
index 1c4a1b6b..3dd5452 100644
--- a/chrome/browser/extensions/service_worker_apitest.cc
+++ b/chrome/browser/extensions/service_worker_apitest.cc
@@ -3,6 +3,8 @@
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "content/public/test/browser_test_utils.h"
 #include "extensions/test/extension_test_message_listener.h"
 
 namespace extensions {
@@ -22,14 +24,7 @@
 
 IN_PROC_BROWSER_TEST_F(ServiceWorkerTest, RegisterServiceWorkersOnTrunk) {
   ExtensionTestMessageListener listener(false);
-  // This should fail because there are changes to be made to
-  // successfully register a service worker.
-  ASSERT_FALSE(RunExtensionTest("service_worker/register")) << message_;
-  ASSERT_TRUE(listener.WaitUntilSatisfied());
-  ASSERT_EQ(
-      "SecurityError: Failed to register a ServiceWorker: No URL is "
-      "associated with the caller's document.",
-      listener.message());
+  ASSERT_TRUE(RunExtensionTest("service_worker/register")) << message_;
 }
 
 // This feature is restricted to trunk, so on dev it should have existing
@@ -40,11 +35,33 @@
   ExtensionTestMessageListener listener(false);
   ASSERT_FALSE(RunExtensionTest("service_worker/register")) << message_;
   ASSERT_TRUE(listener.WaitUntilSatisfied());
-  ASSERT_EQ(
+  EXPECT_EQ(
       "SecurityError: Failed to register a ServiceWorker: The URL "
       "protocol of the current origin ('chrome-extension://" +
           GetSingleLoadedExtension()->id() + "') is not supported.",
       listener.message());
 }
 
+IN_PROC_BROWSER_TEST_F(ServiceWorkerTest, ServiceWorkerFetchEvent) {
+  RunExtensionTest("service_worker/fetch");
+  content::WebContents* contents =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  content::WaitForLoadStop(contents);
+
+  std::string output;
+  ASSERT_TRUE(content::ExecuteScriptAndExtractString(
+      contents, "window.domAutomationController.send(document.body.innerText);",
+      &output));
+  EXPECT_EQ("No Fetch Event yet.", output);
+
+  // Page must reload in order for the service worker to take control.
+  contents->GetController().Reload(true);
+  content::WaitForLoadStop(contents);
+
+  ASSERT_TRUE(content::ExecuteScriptAndExtractString(
+      contents, "window.domAutomationController.send(document.body.innerText);",
+      &output));
+  EXPECT_EQ("Caught a fetch!", output);
+}
+
 }  // namespace extensions