Remove "transition-compositing" flags

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 381 matching lines @@
   if (command_line.HasSwitch(switches::kDisablePreferCompositingToLCDText))
     return false;
   if (command_line.HasSwitch(switches::kEnablePreferCompositingToLCDText))
     return true;
   if (RenderThreadImpl::current() &&
       !RenderThreadImpl::current()->is_lcd_text_enabled())
     return true;
   return DeviceScaleEnsuresTextQuality(device_scale_factor);
 }
 
-static bool ShouldUseTransitionCompositing(float device_scale_factor) {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-
-  if (command_line.HasSwitch(switches::kDisableCompositingForTransition))
-    return false;
-
-  if (command_line.HasSwitch(switches::kEnableCompositingForTransition))
-    return true;
-
-  // TODO(ajuma): Re-enable this by default for high-DPI once the problem
-  // of excessive layer promotion caused by overlap has been addressed.
-  // http://crbug.com/178119.
-  return false;
-}
-
 static FaviconURL::IconType ToFaviconType(blink::WebIconURL::Type type) {
   switch (type) {
     case blink::WebIconURL::TypeFavicon:
       return FaviconURL::FAVICON;
     case blink::WebIconURL::TypeTouch:
       return FaviconURL::TOUCH_ICON;
     case blink::WebIconURL::TypeTouchPrecomposed:
       return FaviconURL::TOUCH_PRECOMPOSED_ICON;
     case blink::WebIconURL::TypeInvalid:
       return FaviconURL::INVALID_ICON;
@@ skipping 316 matching lines @@
   if (opener_id_ == MSG_ROUTING_NONE) {
     did_show_ = true;
     CompleteInit();
   }
 
   g_view_map.Get().insert(std::make_pair(webview(), this));
   g_routing_id_view_map.Get().insert(std::make_pair(routing_id_, this));
   webview()->setDeviceScaleFactor(device_scale_factor_);
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(device_scale_factor_));
-  webview()->settings()->setAcceleratedCompositingForTransitionEnabled(
-      ShouldUseTransitionCompositing(device_scale_factor_));
   webview()->settings()->setThreadedScrollingEnabled(
       !command_line.HasSwitch(switches::kDisableThreadedScrolling));
   webview()->settings()->setRootLayerScrolls(
       command_line.HasSwitch(switches::kRootLayerScrolls));
 
   ApplyWebPreferences(webkit_preferences_, webview());
 
   webview()->settings()->setAllowConnectingInsecureWebSocket(
       command_line.HasSwitch(switches::kAllowInsecureWebSocketFromHttpsOrigin));
 
@@ skipping 2838 matching lines @@
                                         replacement_range,
                                         keep_selection);
 }
 
 void RenderViewImpl::SetDeviceScaleFactor(float device_scale_factor) {
   RenderWidget::SetDeviceScaleFactor(device_scale_factor);
   if (webview()) {
     webview()->setDeviceScaleFactor(device_scale_factor);
     webview()->settings()->setPreferCompositingToLCDTextEnabled(
         PreferCompositingToLCDText(device_scale_factor_));
-    webview()->settings()->setAcceleratedCompositingForTransitionEnabled(
-        ShouldUseTransitionCompositing(device_scale_factor_));
   }
   if (auto_resize_mode_)
     AutoResizeCompositor();
 
   if (browser_plugin_manager_.get())
     browser_plugin_manager_->UpdateDeviceScaleFactor();
 }
 
 bool RenderViewImpl::SetDeviceColorProfile(
     const std::vector<char>& profile) {
@@ skipping 503 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content