Allow browser compositor to create an offscreen context3D.

This is needed for using compositor filters in Aura such as glass blur.

BUG=99528
TEST=


Review URL: http://codereview.chromium.org/9568042

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124594 0039d316-1c4b-4281-b951-d872f2087c98

content/common/webkitplatformsupport_impl.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 "base/command_line.h"
 #include "content/common/child_thread.h"
+#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/socket_stream_dispatcher.h"
 #include "content/common/webkitplatformsupport_impl.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_switches.h"
+#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
 
 namespace content {
 
@@ -46,4 +50,23 @@ WebKitPlatformSupportImpl::CreateWebSocketBridge(
   return dispatcher->CreateBridge(handle, delegate);
 }
 
+WebKit::WebGraphicsContext3D*
+WebKitPlatformSupportImpl::createOffscreenGraphicsContext3D(
+    const WebGraphicsContext3D::Attributes& attributes) {
+  // The WebGraphicsContext3DInProcessImpl code path is used for
+  // layout tests (though not through this code) as well as for
+  // debugging and bringing up new ports.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kInProcessWebGL)) {
+    return webkit::gpu::WebGraphicsContext3DInProcessImpl::CreateForWebView(
+            attributes, false);
+  } else {
+    base::WeakPtr<WebGraphicsContext3DSwapBuffersClient> null_client;
+    scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
+        new WebGraphicsContext3DCommandBufferImpl(0, GURL(), null_client));
+    if (!context->Initialize(attributes))
+      return NULL;
+    return context.release();
+  }
+}
+
 }  // namespace content

content/common/webkitplatformsupport_impl.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -30,6 +30,8 @@ class CONTENT_EXPORT WebKitPlatformSupportImpl
   virtual webkit_glue::WebSocketStreamHandleBridge* CreateWebSocketBridge(
       WebKit::WebSocketStreamHandle* handle,
       webkit_glue::WebSocketStreamHandleDelegate* delegate) OVERRIDE;
+  virtual WebKit::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
+      const WebKit::WebGraphicsContext3D::Attributes& attributes);
 };
 
 }  // namespace content

content/renderer/renderer_webkitplatformsupport_impl.cc

@@ -14,7 +14,6 @@
 #include "content/common/fileapi/webblobregistry_impl.h"
 #include "content/common/fileapi/webfilesystem_impl.h"
 #include "content/common/file_utilities_messages.h"
-#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/indexed_db/proxy_webidbfactory_impl.h"
 #include "content/common/mime_registry_messages.h"
 #include "content/common/npobject_util.h"
@@ -50,7 +49,6 @@
 #include "webkit/glue/webclipboard_impl.h"
 #include "webkit/glue/webfileutilities_impl.h"
 #include "webkit/glue/webkit_glue.h"
-#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
 
 #if defined(OS_WIN)
 #include "content/common/child_process_messages.h"
@@ -581,25 +579,6 @@ RendererWebKitPlatformSupportImpl::sharedWorkerRepository() {
   }
 }
 
-WebKit::WebGraphicsContext3D*
-RendererWebKitPlatformSupportImpl::createOffscreenGraphicsContext3D(
-    const WebGraphicsContext3D::Attributes& attributes) {
-  // The WebGraphicsContext3DInProcessImpl code path is used for
-  // layout tests (though not through this code) as well as for
-  // debugging and bringing up new ports.
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kInProcessWebGL)) {
-    return webkit::gpu::WebGraphicsContext3DInProcessImpl::CreateForWebView(
-            attributes, false);
-  } else {
-    base::WeakPtr<WebGraphicsContext3DSwapBuffersClient> null_client;
-    scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
-        new WebGraphicsContext3DCommandBufferImpl(0, GURL(), null_client));
-    if (!context->Initialize(attributes))
-      return NULL;
-    return context.release();
-  }
-}
-
 double RendererWebKitPlatformSupportImpl::audioHardwareSampleRate() {
   return audio_hardware::GetOutputSampleRate();
 }

content/renderer/renderer_webkitplatformsupport_impl.h

@@ -82,8 +82,6 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
       const WebKit::WebString& keyPath) OVERRIDE;
   virtual WebKit::WebFileSystem* fileSystem() OVERRIDE;
   virtual WebKit::WebSharedWorkerRepository* sharedWorkerRepository() OVERRIDE;
-  virtual WebKit::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
-      const WebKit::WebGraphicsContext3D::Attributes& attributes);
   virtual double audioHardwareSampleRate() OVERRIDE;
   virtual size_t audioHardwareBufferSize() OVERRIDE;
   virtual WebKit::WebAudioDevice* createAudioDevice(