Added preliminary support for tile rasterization with Ganesh

cc/base/switches.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 "cc/base/switches.h"
 
 #include "base/command_line.h"
 
 namespace cc {
 namespace switches {
@@ skipping 153 matching lines @@
     return true;
 
 #if defined(OS_ANDROID)
   return false;
 #else
   return true;
 #endif
 }
 
 namespace {
+
 bool CheckImplSidePaintingStatus() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   if (command_line.HasSwitch(cc::switches::kDisableImplSidePainting))
     return false;
   else if (command_line.HasSwitch(cc::switches::kEnableImplSidePainting))
     return true;
 
 #if defined(OS_ANDROID)
   return true;
 #else
   return false;
 #endif
 }
+
+bool CheckGPURasterizationStatus() {
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  return command_line.HasSwitch(cc::switches::kEnableGPURasterization);
+}
+
 }  // namespace
 
 bool IsImplSidePaintingEnabled() {
   static bool enabled = CheckImplSidePaintingStatus();
   return enabled;
 }
 
 bool IsGPURasterizationEnabled() {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-  return command_line.HasSwitch(cc::switches::kEnableGPURasterization);
+  static bool enabled = CheckGPURasterizationStatus();
+  return enabled;
 }
 
 bool IsMapImageEnabled() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   if (command_line.HasSwitch(cc::switches::kDisableMapImage))
     return false;
   else if (command_line.HasSwitch(cc::switches::kEnableMapImage))
     return true;
 
   return false;
 }
 
 }  // namespace switches
 }  // namespace cc