Allow content script insertion on about:-URLs.

chrome/browser/extensions/script_executor.h

Index: chrome/browser/extensions/script_executor.h
diff --git a/chrome/browser/extensions/script_executor.h b/chrome/browser/extensions/script_executor.h
index 03c1f550c30a5161c56c33a54740f6c3dbd193fb..be69bfa1c873e260d0212e80c727f2e20dca9bf4 100644
--- a/chrome/browser/extensions/script_executor.h
+++ b/chrome/browser/extensions/script_executor.h
@@ -49,6 +49,13 @@ class ScriptExecutor {
     ALL_FRAMES,
   };
 
+  // Whether to insert the script in about: frames when its origin matches
+  // the extension's host permissions.
+  enum MatchAboutBlank {
+    MATCH_ABOUT_BLANK,
+    DONT_MATCH_ABOUT_BLANK,

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

switch the order of these, false should have the 0 value.

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

Done.

+  };
+
   // The type of world to inject into (main world, or its own isolated world).
   enum WorldType {
     MAIN_WORLD,
@@ -83,6 +90,7 @@ class ScriptExecutor {
                      ScriptType script_type,
                      const std::string& code,
                      FrameScope frame_scope,
+                     MatchAboutBlank match_about_blank,
                      UserScript::RunLocation run_at,
                      WorldType world_type,
                      ProcessType process_type,