make command buffer work in DRT

webkit/support/webkit_support.cc

 // Copyright (c) 2011 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 "webkit/support/webkit_support.h"
 
 #include "base/at_exit.h"
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 196 matching lines @@
 
   virtual void Cancel() {
     adaptor_.reset();
   }
 
  private:
   scoped_ptr<webkit_support::TaskAdaptor> adaptor_;
 };
 
 webkit_support::GraphicsContext3DImplementation
-    g_graphics_context_3d_implementation = webkit_support::IN_PROCESS;
+    g_graphics_context_3d_implementation =
+        webkit_support::IN_PROCESS_COMMAND_BUFFER;
 
 }  // namespace
 
 namespace webkit_support {
 
 static TestEnvironment* test_environment;
 
 static void SetUpTestEnvironmentImpl(bool unit_test_mode) {
   base::EnableInProcessStackDumping();
   base::EnableTerminationOnHeapCorruption();
@@ skipping 375 matching lines @@
       test_environment->webkit_client()->fileSystem());
   fileSystem->OpenFileSystem(frame, type, size, create, callbacks);
 }
 
 // Timers
 double GetForegroundTabTimerInterval() {
   return webkit_glue::kForegroundTabTimerInterval;
 }
 
 }  // namespace webkit_support