Allow to have a transparent UA dependent background.

content/renderer/render_view_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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 1364 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_EnumerateDirectoryResponse,
                         OnEnumerateDirectoryResponse)
     IPC_MESSAGE_HANDLER(ViewMsg_RunFileChooserResponse, OnFileChooserResponse)
     IPC_MESSAGE_HANDLER(ViewMsg_SuppressDialogsUntilSwapOut,
                         OnSuppressDialogsUntilSwapOut)
     IPC_MESSAGE_HANDLER(ViewMsg_ClosePage, OnClosePage)
     IPC_MESSAGE_HANDLER(ViewMsg_ThemeChanged, OnThemeChanged)
     IPC_MESSAGE_HANDLER(ViewMsg_MoveOrResizeStarted, OnMoveOrResizeStarted)
     IPC_MESSAGE_HANDLER(ViewMsg_ClearFocusedElement, OnClearFocusedElement)
     IPC_MESSAGE_HANDLER(ViewMsg_SetBackgroundOpaque, OnSetBackgroundOpaque)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetBackgroundColor, OnSetBackgroundColor)
     IPC_MESSAGE_HANDLER(ViewMsg_EnablePreferredSizeChangedMode,
                         OnEnablePreferredSizeChangedMode)
     IPC_MESSAGE_HANDLER(ViewMsg_EnableAutoResize, OnEnableAutoResize)
     IPC_MESSAGE_HANDLER(ViewMsg_DisableAutoResize, OnDisableAutoResize)
     IPC_MESSAGE_HANDLER(ViewMsg_DisableScrollbarsForSmallWindows,
                         OnDisableScrollbarsForSmallWindows)
     IPC_MESSAGE_HANDLER(ViewMsg_SetRendererPrefs, OnSetRendererPrefs)
     IPC_MESSAGE_HANDLER(ViewMsg_MediaPlayerActionAt, OnMediaPlayerActionAt)
     IPC_MESSAGE_HANDLER(ViewMsg_PluginActionAt, OnPluginActionAt)
     IPC_MESSAGE_HANDLER(ViewMsg_SetActive, OnSetActive)
@@ skipping 1385 matching lines @@
     webview()->clearFocusedElement();
 }
 
 void RenderViewImpl::OnSetBackgroundOpaque(bool opaque) {
   if (frame_widget_)
     frame_widget_->setIsTransparent(!opaque);
   if (compositor_)
     compositor_->setHasTransparentBackground(!opaque);
 }
 
+void RenderViewImpl::OnSetBackgroundColor(SkColor color) {
+  webview()->setBaseBackgroundColor(color);
+  compositor_->setBackgroundColor(color);
+}
+
 void RenderViewImpl::OnSetActive(bool active) {
   if (webview())
     webview()->setIsActive(active);
 
 #if defined(ENABLE_PLUGINS) && defined(OS_MACOSX)
   std::set<WebPluginDelegateProxy*>::iterator plugin_it;
   for (plugin_it = plugin_delegates_.begin();
        plugin_it != plugin_delegates_.end(); ++plugin_it) {
     (*plugin_it)->SetWindowFocus(active);
   }
@@ skipping 749 matching lines @@
   if (IsUseZoomForDSFEnabled()) {
     webview()->setZoomFactorForDeviceScaleFactor(device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(compositor_deps_, device_scale_factor_));
 }
 
 }  // namespace content