Remove frame ID from DidCommitProvisionalLoad.

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 91 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(searchable_form_encoding)
   IPC_STRUCT_TRAITS_MEMBER(contents_mime_type)
   IPC_STRUCT_TRAITS_MEMBER(socket_address)
 IPC_STRUCT_TRAITS_END()
 
 // Parameters structure for FrameHostMsg_DidCommitProvisionalLoad, which has
 // too many data parameters to be reasonably put in a predefined IPC message.
 IPC_STRUCT_BEGIN_WITH_PARENT(FrameHostMsg_DidCommitProvisionalLoad_Params,
                              content::FrameNavigateParams)
   IPC_STRUCT_TRAITS_PARENT(content::FrameNavigateParams)
-  // The frame ID for this navigation. The frame ID uniquely identifies the
-  // frame the navigation happened in for a given renderer.
-  IPC_STRUCT_MEMBER(int64, frame_id)
-
   // The WebFrame's uniqueName().
   IPC_STRUCT_MEMBER(base::string16, frame_unique_name)
 
   // Information regarding the security of the connection (empty if the
   // connection was not secure).
   IPC_STRUCT_MEMBER(std::string, security_info)
 
   // The gesture that initiated this navigation.
   IPC_STRUCT_MEMBER(content::NavigationGesture, gesture)
 
@@ skipping 304 matching lines @@
 // content area, and a context menu should be shown for it. The params
 // object contains information about the node(s) that were selected when the
 // user right clicked.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ContextMenu, content::ContextMenuParams)
 
 // Initial drawing parameters for a child frame that has been swapped out to
 // another process.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_InitializeChildFrame,
                     gfx::Rect /* frame_rect */,
                     float /* scale_factor */)