Remove foreground tab idle handler

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 969 matching lines @@
 
 // Asks the browser for a unique routing ID.
 IPC_SYNC_MESSAGE_CONTROL0_1(ViewHostMsg_GenerateRoutingID,
                             int /* routing_id */)
 
 // Asks the browser for the default audio hardware configuration.
 IPC_SYNC_MESSAGE_CONTROL0_2(ViewHostMsg_GetAudioHardwareConfig,
                             media::AudioParameters /* input parameters */,
                             media::AudioParameters /* output parameters */)
 
-// Asks the browser for CPU usage of the renderer process in percents.
-IPC_SYNC_MESSAGE_CONTROL0_1(ViewHostMsg_GetCPUUsage,
-                            int /* CPU usage in percents */)
-
 // Asks the browser for the renderer process memory size stats.
 IPC_SYNC_MESSAGE_CONTROL0_2(ViewHostMsg_GetProcessMemorySizes,
                             size_t /* private_bytes */,
                             size_t /* shared_bytes */)
 
 // These three messages are sent to the parent RenderViewHost to display the
 // page/widget that was created by
 // CreateWindow/CreateWidget/CreateFullscreenWidget. routing_id
 // refers to the id that was returned from the Create message above.
 // The initial_position parameter is a rectangle in screen coordinates.
@@ skipping 632 matching lines @@
 // Since the browser keeps handles to the allocated transport DIBs, this
 // message is sent to tell the browser that it may release them when the
 // renderer is finished with them.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_FreeTransportDIB,
                      TransportDIB::Id /* DIB id */)
 #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.