Move didAccessInitialDocument to RenderFrame.

content/common/frame_messages.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/frame_message_enums.h"
@@ skipping 411 matching lines @@
 // notion of the throbber stopping.
 IPC_MESSAGE_ROUTED0(FrameHostMsg_DidStopLoading)
 
 // Requests that the given URL be opened in the specified manner.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_OpenURL, FrameHostMsg_OpenURL_Params)
 
 // Notifies the browser that a frame finished loading.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_DidFinishLoad,
                     GURL /* validated_url */)
 
+// Notifies that the initial empty document of a view has been accessed.
+// After this, it is no longer safe to show a pending navigation's URL without
+// making a URL spoof possible.
+IPC_MESSAGE_ROUTED0(FrameHostMsg_DidAccessInitialDocument)
+
 // Following message is used to communicate the values received by the
 // callback binding the JS to Cpp.
 // An instance of browser that has an automation host listening to it can
 // have a javascript send a native value (string, number, boolean) to the
 // listener in Cpp. (DomAutomationController)
 IPC_MESSAGE_ROUTED2(FrameHostMsg_DomOperationResponse,
                     std::string  /* json_string */,
                     int  /* automation_id */)
 
 // Sent to the browser when the renderer detects it is blocked on a pepper
@@ skipping 119 matching lines @@
                     SkColor /* color */,
                     std::vector<content::ColorSuggestion> /* suggestions */)
 
 // Asks the browser to end the color chooser.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_EndColorChooser, int /* id */)
 
 // Change the selected color in the color chooser.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_SetSelectedColorInColorChooser,
                     int /* id */,
                     SkColor /* color */)