re-apply r34183...

chrome/renderer/render_view.cc

 // Copyright (c) 2009 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.
 
 #if defined(ENABLE_PEPPER)
 #define PEPPER_APIS_ENABLED
 #endif
 
 #include "chrome/renderer/render_view.h"
 
@@ skipping 3198 matching lines @@
 void RenderView::OnEnablePreferredSizeChangedMode() {
   send_preferred_size_changes_ = true;
 }
 
 void RenderView::OnSetRendererPrefs(const RendererPreferences& renderer_prefs) {
   renderer_preferences_ = renderer_prefs;
   UpdateFontRenderingFromRendererPrefs();
 #if defined(OS_LINUX) && !defined(TOOLKIT_VIEWS)
   WebColorName name = WebKit::WebColorWebkitFocusRingColor;
   WebKit::setNamedColors(&name, &renderer_prefs.focus_ring_color, 1);
+
+  if (webview())
+    webview()->setScrollbarColors(
+        renderer_prefs.thumb_inactive_color,
+        renderer_prefs.thumb_active_color,
+        renderer_prefs.track_color);
 #endif
 }
 
 void RenderView::OnMediaPlayerActionAt(const gfx::Point& location,
                                        const WebMediaPlayerAction& action) {
   if (webview())
     webview()->performMediaPlayerAction(action, location);
 }
 
 void RenderView::OnNotifyRendererViewType(ViewType::Type type) {
@@ skipping 655 matching lines @@
       new PluginMsg_SignalModalDialogEvent(host_window_));
 
   message->EnableMessagePumping();  // Runs a nested message loop.
   bool rv = Send(message);
 
   PluginChannelHost::Broadcast(
       new PluginMsg_ResetModalDialogEvent(host_window_));
 
   return rv;
 }