Refactor cc scrollbar layers to separate solid-color vs desktop.

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 534 matching lines @@
   prefs.region_based_columns_enabled =
       command_line.HasSwitch(switches::kEnableRegionBasedColumns);
   prefs.threaded_html_parser =
       !command_line.HasSwitch(switches::kDisableThreadedHTMLParser);
   prefs.experimental_websocket_enabled =
       command_line.HasSwitch(switches::kEnableExperimentalWebSocket);
   if (command_line.HasSwitch(cc::switches::kEnablePinchVirtualViewport)) {
     prefs.pinch_virtual_viewport_enabled = true;
     prefs.pinch_overlay_scrollbar_thickness = 10;
   }
+  prefs.use_solid_color_scrollbars =
+      command_line.HasSwitch(switches::kUseSolidColorScrollbars);
 
 #if defined(OS_ANDROID)
   prefs.user_gesture_required_for_media_playback = !command_line.HasSwitch(
       switches::kDisableGestureRequirementForMediaPlayback);
 #endif
 
   prefs.touch_enabled = ui::AreTouchEventsEnabled();
   prefs.device_supports_touch = prefs.touch_enabled &&
       ui::IsTouchDevicePresent();
 #if defined(OS_ANDROID)
@@ skipping 3180 matching lines @@
 }
 
 void WebContentsImpl::ClearAllPowerSaveBlockers() {
   for (PowerSaveBlockerMap::iterator i(power_save_blockers_.begin());
        i != power_save_blockers_.end(); ++i)
     STLDeleteValues(&power_save_blockers_[i->first]);
   power_save_blockers_.clear();
 }
 
 }  // namespace content