<webview>: Implement ExecuteScript

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 5c0dd671b99a4e7b362cd506d319442be2d615ad..170f3fe6455865ec075f6655f94e2401629efae1 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -110,6 +110,10 @@ class CONTENT_EXPORT ContentBrowserClient {
   // Notifies that a new RenderHostView has been created.
   virtual void RenderViewHostCreated(RenderViewHost* render_view_host) {}
 
+  // Notifies that a <webview> guest WebContents has been created.
+  virtual void GuestWebContentsCreated(WebContents* guest_web_contents,
+                                       WebContents* embedder_web_contents) {}
+
   // Notifies that a RenderProcessHost has been created. This is called before
   // the content layer adds its own BrowserMessageFilters, so that the
   // embedder's IPC filters have priority.