Plumbing explicit share groups through context creation

content/renderer/renderer_webkitplatformsupport_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
@@ skipping 115 matching lines @@
   virtual blink::WebBlobRegistry* blobRegistry();
   virtual void sampleGamepads(blink::WebGamepads&);
   virtual blink::WebString userAgent(const blink::WebURL& url);
   virtual blink::WebRTCPeerConnectionHandler* createRTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client);
   virtual blink::WebMediaStreamCenter* createMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client);
   virtual bool processMemorySizesInBytes(
       size_t* private_bytes, size_t* shared_bytes);
   virtual blink::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
+#ifdef ENABLE_EXPLICIT_GL_SHARE_GROUPS
+      const blink::WebGraphicsContext3D::Attributes& attributes,
+      blink::WebGraphicsContext3D* share_context);
+#else
       const blink::WebGraphicsContext3D::Attributes& attributes);
+#endif
   virtual blink::WebGraphicsContext3DProvider*
       createSharedOffscreenGraphicsContext3DProvider();
   virtual blink::WebCompositorSupport* compositorSupport();
   virtual blink::WebString convertIDNToUnicode(
       const blink::WebString& host, const blink::WebString& languages);
   virtual void setDeviceMotionListener(
       blink::WebDeviceMotionListener* listener) OVERRIDE;
   virtual void setDeviceOrientationListener(
       blink::WebDeviceOrientationListener* listener) OVERRIDE;
   virtual blink::WebCrypto* crypto() OVERRIDE;
@@ skipping 70 matching lines @@
   webkit::WebCompositorSupportImpl compositor_support_;
 
   scoped_ptr<WebCryptoImpl> web_crypto_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererWebKitPlatformSupportImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_