Move preferred scrollbar style preference change listening from renderer to browser, 2 of 3.

content/renderer/render_thread_impl.cc

 // 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.
 
 #include "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 105 matching lines @@
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <objbase.h>
 #else
 // TODO(port)
 #include "base/memory/scoped_handle.h"
 #include "content/child/npapi/np_channel_base.h"
 #endif
 
-#if defined(OS_MACOSX)
-#include "third_party/WebKit/public/web/mac/WebScrollbarTheme.h"
-#endif
-
 #if defined(OS_POSIX)
 #include "ipc/ipc_channel_posix.h"
 #endif
 
 #if defined(OS_ANDROID)
 #include <cpu-features.h>
 #include "content/renderer/android/synchronous_compositor_factory.h"
 #include "content/renderer/media/android/renderer_demuxer_android.h"
 #endif
 
@@ skipping 1151 matching lines @@
     if (suspend) {
       webkit_platform_support_->SuspendSharedTimer();
     } else {
       webkit_platform_support_->ResumeSharedTimer();
     }
   }
 }
 #endif
 
 #if defined(OS_MACOSX)
-void RenderThreadImpl::OnUpdateScrollbarTheme(float initial_button_delay,
-                                              float autoscroll_button_delay,
-                                              bool jump_on_track_click,
-                                              bool redraw) {
+void RenderThreadImpl::OnUpdateScrollbarTheme(
+    float initial_button_delay,
+    float autoscroll_button_delay,
+    bool jump_on_track_click,
+    blink::ScrollerStyle preferred_scroller_style,
+    bool redraw) {
   blink::WebScrollbarTheme::updateScrollbars(initial_button_delay,
                                              autoscroll_button_delay,
                                              jump_on_track_click,
+                                             preferred_scroller_style,
                                              redraw);
 }
 #endif
 
 void RenderThreadImpl::OnMemoryPressure(
     base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
   base::allocator::ReleaseFreeMemory();
 
   if (memory_pressure_level ==
       base::MemoryPressureListener::MEMORY_PRESSURE_CRITICAL) {
@@ skipping 84 matching lines @@
   hidden_widget_count_--;
 
   if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     return;
   }
 
   ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 }
 
 }  // namespace content