Move strings from webkit/ content/.

This moves the strings that were previously in webkit/glue/resources/*.xtb into
 content/app/strings/translations/*.xtb and makes the necessary GYP, GN and C++ changes
 to make all this work.

BUG=338338
TEST=content_shell, content_unittests. No functional changes.
[email protected],[email protected]
[email protected]

Review URL: https://codereview.chromium.org/423613003

Cr-Commit-Position: refs/heads/master@{#288589}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288589 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/shell/BUILD.gn b/content/shell/BUILD.gn
index 591e395..7e18991f 100644
--- a/content/shell/BUILD.gn
+++ b/content/shell/BUILD.gn
@@ -206,6 +206,7 @@
     "//components/breakpad/app",
     "//content:resources",
     "//content/app:both",
+    "//content/app/strings",
     "//content/gpu",
     "//content/ppapi_plugin",
     "//content/public/browser",
@@ -387,8 +388,9 @@
 
 repack("pak") {
   sources = [
-    "$root_gen_dir/content/content_resources.pak",
+    "$root_gen_dir/content/app/strings/content_strings_en-US.pak",
     "$root_gen_dir/content/browser/tracing/tracing_resources.pak",
+    "$root_gen_dir/content/content_resources.pak",
     "$root_gen_dir/content/shell/shell_resources.pak",
     "$root_gen_dir/net/net_resources.pak",
     "$root_gen_dir/ui/resources/ui_resources_100_percent.pak",
@@ -397,18 +399,17 @@
     "$root_gen_dir/ui/strings/ui_strings_en-US.pak",
     "$root_gen_dir/webkit/blink_resources.pak",
     "$root_gen_dir/webkit/webkit_resources_100_percent.pak",
-    "$root_gen_dir/webkit/webkit_strings_en-US.pak",
   ]
 
   deps = [
     ":resources",
     "//content:resources",
+    "//content/app/strings",
     "//content/browser/tracing:resources",
     "//net:net_resources",
     "//ui/resources",
     "//ui/strings",
     "//webkit:resources",
-    "//webkit:strings",
   ]
 
   if (is_android) {