Connect up --disable-gl-multisampling to command buffer

chrome/gpu/gpu_command_buffer_stub.h

Index: chrome/gpu/gpu_command_buffer_stub.h
diff --git a/chrome/gpu/gpu_command_buffer_stub.h b/chrome/gpu/gpu_command_buffer_stub.h
index 7124e2521623fd6df7e583f8cd905ffca7bf674a..64d15fd1665806247bb56cb88635adc1e3cad4d5 100644
--- a/chrome/gpu/gpu_command_buffer_stub.h
+++ b/chrome/gpu/gpu_command_buffer_stub.h
@@ -31,6 +31,7 @@ class GpuCommandBufferStub
                        gfx::PluginWindowHandle handle,
                        GpuCommandBufferStub* parent,
                        const gfx::Size& size,
+                       const gpu::gles2::DisallowedExtensions& disallowed,
                        const std::string& allowed_extensions,
                        const std::vector<int32>& attribs,
                        uint32 parent_texture_id,
@@ -106,6 +107,7 @@ class GpuCommandBufferStub
   gfx::PluginWindowHandle handle_;
   base::WeakPtr<GpuCommandBufferStub> parent_;
   gfx::Size initial_size_;
+  gpu::gles2::DisallowedExtensions disallowed_extensions_;
   std::string allowed_extensions_;
   std::vector<int32> requested_attribs_;
   uint32 parent_texture_id_;