Reapplies all the IPC system work (reverts the revert r56272).

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
 
 // If this gets included after the gtk headers, then a bunch of compiler
 // errors happen because of a "#define Status int" in Xlib.h, which interacts
 // badly with URLRequestStatus::Status.
 #include "chrome/common/render_messages.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
 #include <cairo/cairo.h>
 
 #include <algorithm>
 #include <string>
 
 #include "app/l10n_util.h"
 #include "app/x11_util.h"
 #include "base/command_line.h"
 #include "base/logging.h"
+#include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/string_number_conversions.h"
 #include "base/task.h"
 #include "base/time.h"
 #include "chrome/browser/gtk/gtk_util.h"
 #include "chrome/browser/renderer_host/backing_store_x.h"
 #include "chrome/browser/renderer_host/gpu_view_host.h"
 #include "chrome/browser/renderer_host/gtk_im_context_wrapper.h"
 #include "chrome/browser/renderer_host/gtk_key_bindings_handler.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
@@ skipping 982 matching lines @@
 }
 
 // static
 RenderWidgetHostView*
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView widget) {
   gpointer user_data = g_object_get_data(G_OBJECT(widget),
                                          kRenderWidgetHostViewKey);
   return reinterpret_cast<RenderWidgetHostView*>(user_data);
 }