Plumbing explicit share groups through context creation

content/common/gpu/client/webgraphicscontext3d_command_buffer_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_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 90 matching lines @@
   // problem communicating with the GPU process.
   bool IsCommandBufferContextLost();
 
   // Create & initialize a WebGraphicsContext3DCommandBufferImpl.  Return NULL
   // on any failure.
   static CONTENT_EXPORT WebGraphicsContext3DCommandBufferImpl*
       CreateOffscreenContext(
           GpuChannelHost* host,
           const WebGraphicsContext3D::Attributes& attributes,
           const GURL& active_url,
-          const SharedMemoryLimits& limits);
+          const SharedMemoryLimits& limits,
+          WebGraphicsContext3D* share_context);
 
   size_t GetMappedMemoryLimit() {
     return mem_limits_.mapped_memory_reclaim_limit;
   }
 
   //----------------------------------------------------------------------
   // WebGraphicsContext3D methods
 
   // Must be called after initialize() and before any of the following methods.
   // Permanently binds to the first calling thread. Returns false if the
@@ skipping 533 matching lines @@
     SHARE_RESOURCES           = 0x10000,
     BIND_GENERATES_RESOURCES  = 0x10001,
     FAIL_IF_MAJOR_PERF_CAVEAT = 0x10002
   };
   friend class WebGraphicsContext3DErrorMessageCallback;
 
   // Initialize the underlying GL context. May be called multiple times; second
   // and subsequent calls are ignored. Must be called from the thread that is
   // going to use this object to issue GL commands (which might not be the main
   // thread).
-  bool MaybeInitializeGL();
+  bool MaybeInitializeGL(WebGraphicsContext3DCommandBufferImpl* share_context);
 
-  bool InitializeCommandBuffer(bool onscreen);
+  bool InitializeCommandBuffer(
+      bool onscreen, WebGraphicsContext3DCommandBufferImpl* share_context);
 
   void Destroy();
 
   // Create a CommandBufferProxy that renders directly to a view. The view and
   // the associated window must not be destroyed until the returned
   // CommandBufferProxy has been destroyed, otherwise the GPU process might
   // attempt to render to an invalid window handle.
   //
   // NOTE: on Mac OS X, this entry point is only used to set up the
   // accelerated compositor's output. On this platform, we actually pass
   // a gfx::PluginWindowHandle in place of the gfx::NativeViewId,
   // because the facility to allocate a fake PluginWindowHandle is
   // already in place. We could add more entry points and messages to
   // allocate both fake PluginWindowHandles and NativeViewIds and map
   // from fake NativeViewIds to PluginWindowHandles, but this seems like
   // unnecessary complexity at the moment.
-  bool CreateContext(bool onscreen);
+  bool CreateContext(
+      bool onscreen, WebGraphicsContext3DCommandBufferImpl* share_context);
 
   virtual void OnGpuChannelLost();
   virtual void OnErrorMessage(const std::string& message, int id);
 
   bool initialize_failed_;
 
   bool visible_;
 
   // State needed by MaybeInitializeGL.
   scoped_refptr<GpuChannelHost> host_;
@@ skipping 21 matching lines @@
   scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
   scoped_ptr<gpu::TransferBuffer> transfer_buffer_;
   gpu::gles2::GLES2Interface* gl_;
   scoped_ptr<gpu::gles2::GLES2Implementation> real_gl_;
   scoped_ptr<gpu::gles2::GLES2Interface> trace_gl_;
   Error last_error_;
   bool bind_generates_resources_;
   SharedMemoryLimits mem_limits_;
 
   uint32_t flush_id_;
+
+  CommandBufferProxyImpl* share_group_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_