Plumbing explicit share groups through context creation

content/renderer/renderer_webkitplatformsupport_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/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/shared_memory.h"
@@ skipping 917 matching lines @@
 
 bool RendererWebKitPlatformSupportImpl::processMemorySizesInBytes(
     size_t* private_bytes, size_t* shared_bytes) {
   content::RenderThread::Get()->Send(
       new ViewHostMsg_GetProcessMemorySizes(private_bytes, shared_bytes));
   return true;
 }
 
 //------------------------------------------------------------------------------
 
+
 blink::WebGraphicsContext3D*
 RendererWebKitPlatformSupportImpl::createOffscreenGraphicsContext3D(
+#ifdef ENABLE_EXPLICIT_GL_SHARE_GROUPS
+    const blink::WebGraphicsContext3D::Attributes& attributes,
+    blink::WebGraphicsContext3D* share_context) {
+#else
     const blink::WebGraphicsContext3D::Attributes& attributes) {
+    blink::WebGraphicsContext3D* share_context = NULL;
+#endif
   if (!RenderThreadImpl::current())
     return NULL;
 
   scoped_refptr<GpuChannelHost> gpu_channel_host(
       RenderThreadImpl::current()->EstablishGpuChannelSync(
           CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE));
 
   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
 
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kWebGLCommandBufferSizeKb)) {
     std::string size_string = command_line->GetSwitchValueASCII(
         switches::kWebGLCommandBufferSizeKb);
     size_t buffer_size_kb;
     if (base::StringToSizeT(size_string, &buffer_size_kb)) {
       limits.command_buffer_size = buffer_size_kb * 1024;
     }
   }
 
   return WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
       gpu_channel_host.get(),
       attributes,
       GURL(attributes.topDocumentURL),
-      limits);
+      limits,
+      static_cast<WebGraphicsContext3DCommandBufferImpl*>(share_context));
 }
 
 //------------------------------------------------------------------------------
 
 blink::WebGraphicsContext3DProvider* RendererWebKitPlatformSupportImpl::
     createSharedOffscreenGraphicsContext3DProvider() {
   scoped_refptr<cc::ContextProvider> provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider();
   if (!provider)
     return NULL;
@@ skipping 98 matching lines @@
     return;
   QuotaDispatcher::ThreadSpecificInstance(
       thread_safe_sender_.get(),
       quota_message_filter_.get())->QueryStorageUsageAndQuota(
           storage_partition,
           static_cast<quota::StorageType>(type),
           QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
 }
 
 }  // namespace content