Allow content script insertion on about:-URLs.

chrome/browser/extensions/user_script_master.cc

Index: chrome/browser/extensions/user_script_master.cc
diff --git a/chrome/browser/extensions/user_script_master.cc b/chrome/browser/extensions/user_script_master.cc
index 03afaa5ca7ed5c2665aaeccab30af74c6d46b58e..9cb40eebcb3b920192b0c05dc9fc89edd6409a7a 100644
--- a/chrome/browser/extensions/user_script_master.cc
+++ b/chrome/browser/extensions/user_script_master.cc
@@ -102,10 +102,14 @@ bool UserScriptMaster::ScriptReloader::ParseMetadataHeader(
 
       std::string value;
       if (GetDeclarationValue(line, kIncludeDeclaration, &value)) {
-        // We escape some characters that MatchPattern() considers special.
-        ReplaceSubstringsAfterOffset(&value, 0, "\\", "\\\\");
-        ReplaceSubstringsAfterOffset(&value, 0, "?", "\\?");
-        script->add_glob(value);
+        if (value == "about:blank") {
+          script->set_match_about_blank(true);

[not at google - send to devlin, 2014/04/21 22:34:41]

to answer your question: it might be easy, but it's still [a very small amount
of] code... let's just not change the way that user scripts work.

[robwu, 2014/04/21 23:21:46]

Done.

+        } else {
+          // We escape some characters that MatchPattern() considers special.
+          ReplaceSubstringsAfterOffset(&value, 0, "\\", "\\\\");
+          ReplaceSubstringsAfterOffset(&value, 0, "?", "\\?");
+          script->add_glob(value);
+        }
       } else if (GetDeclarationValue(line, kExcludeDeclaration, &value)) {
         ReplaceSubstringsAfterOffset(&value, 0, "\\", "\\\\");
         ReplaceSubstringsAfterOffset(&value, 0, "?", "\\?");