Switch DomAutomationController to be a RenderFrameObserver.

content/common/view_messages.h

 // Copyright (c) 2012 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 page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
@@ skipping 1956 matching lines @@
 // Requests to unlock the mouse. A ViewMsg_MouseLockLost message will be sent
 // whenever the mouse is unlocked (which may or may not be caused by
 // ViewHostMsg_UnlockMouse).
 IPC_MESSAGE_ROUTED0(ViewHostMsg_UnlockMouse)
 
 // 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(ViewHostMsg_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(ViewHostMsg_DomOperationResponse,
-                    std::string  /* json_string */,
-                    int  /* automation_id */)
-
 // Notifies that multiple touch targets may have been pressed, and to show
 // the disambiguation popup.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_ShowDisambiguationPopup,
                     gfx::Rect, /* Border of touched targets */
                     gfx::Size, /* Size of zoomed image */
                     TransportDIB::Id /* DIB of zoomed image */)
 
 // Sent by the renderer process to check whether client 3D APIs
 // (Pepper 3D, WebGL) are explicitly blocked.
 IPC_SYNC_MESSAGE_CONTROL3_1(ViewHostMsg_Are3DAPIsBlocked,
@@ skipping 155 matching lines @@
 // synchronously (see crbug.com/120597). This IPC message sends the character
 // bounds after every composition change to always have correct bound info.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_ImeCompositionRangeChanged,
                     gfx::Range /* composition range */,
                     std::vector<gfx::Rect> /* character bounds */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.