Remove page id from title and state updating.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 1049 matching lines @@
 // 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)
 
 // Sent when the RenderFrame or RenderFrameProxy either updates its opener to
 // another frame identified by |opener_routing_id|, or, if |opener_routing_id|
 // is MSG_ROUTING_NONE, the frame disowns its opener for the lifetime of the
 // window.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_DidChangeOpener, int /* opener_routing_id */)
 
-// Notifies the browser that a page id was assigned.
-IPC_MESSAGE_ROUTED1(FrameHostMsg_DidAssignPageId, int32_t /* page_id */)
-
 // Notifies the browser that sandbox flags have changed for a subframe of this
 // frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_DidChangeSandboxFlags,
                     int32_t /* subframe_routing_id */,
                     blink::WebSandboxFlags /* updated_flags */)
 
 // Notifies the browser that frame owner properties have changed for a subframe
 // of this frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_DidChangeFrameOwnerProperties,
                     int32_t /* subframe_routing_id */,
@@ skipping 419 matching lines @@
 // nearest find result in the sending frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
                     int /* nfr_request_id */,
                     float /* distance */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.