Add frameId to executeScript/insertCSS

extensions/common/extension_messages.h

Index: extensions/common/extension_messages.h
diff --git a/extensions/common/extension_messages.h b/extensions/common/extension_messages.h
index aee505c44a9d4b8a71a52d1648c842b9b56a2ced..c79bd8335c2376c8d1fc450e33691744d0d410fc 100644
--- a/extensions/common/extension_messages.h
+++ b/extensions/common/extension_messages.h
@@ -119,9 +119,14 @@ IPC_STRUCT_BEGIN(ExtensionMsg_ExecuteCode_Params)
   // The webview guest source who calls to execute code.
   IPC_STRUCT_MEMBER(GURL, webview_src)
 
-  // Whether to inject into all frames, or only the root frame.
+  // Whether to inject into the selected frame and its child frames, or only the
+  // selected frame.
   IPC_STRUCT_MEMBER(bool, all_frames)
 
+  // Frame where the code should be executed. 0 for the root frame, a positive
+  // number for a specific child frame.
+  IPC_STRUCT_MEMBER(int, frame_id)

[nasko, 2015/02/23 18:39:02]

Since this is routing id, let's name it clearly: s/frame_id/frame_routing_id/. 

Why use 0 for the root frame, when it also has a routing id?

[robwu, 2015/02/23 18:59:53]

This is currently a routing ID, but in the future it could be a FrameTreeNode ID
(or whatever that is uniquely identifying a frame). It must be zero to be
compatible with other extension APIs (webNavigation, webRequest, messaging).

+
   // Whether to inject into about:blank (sub)frames.
   IPC_STRUCT_MEMBER(bool, match_about_blank)