Add frameId to chrome.tabs.executeScript/insertCSS

content/public/browser/render_frame_host.h

Index: content/public/browser/render_frame_host.h
diff --git a/content/public/browser/render_frame_host.h b/content/public/browser/render_frame_host.h
index a8f71fe3476e8a935a5be204b7a582b28ca37c9d..3db9cd8a736ff976cfcb2abee112cb91c1e97650 100644
--- a/content/public/browser/render_frame_host.h
+++ b/content/public/browser/render_frame_host.h
@@ -78,6 +78,14 @@ class CONTENT_EXPORT RenderFrameHost : public IPC::Listener,
   // current RenderFrameHost.
   virtual RenderFrameHost* GetParent() = 0;
 
+  // Calls |on_frame| for each child frame of this RenderFrameHost.
+  // Note: The RenderFrameHost parameter is not guaranteed to have a live
+  // RenderFrame counterpart in the renderer process. Callbacks should check
+  // IsRenderFrameLive, as sending IPC messages to it in this case will fail
+  // silently.
+  virtual void ForEachChildFrame(
+      const base::Callback<void(RenderFrameHost*)>& on_frame) = 0;
+
   // Returns the FrameTreeNode ID for this frame. This ID is browser-global and
   // uniquely identifies a frame that hosts content. The identifier is fixed at
   // the creation of the frame and stays constant for the lifetime of the frame.