Make context groups share a TextureBufferManager

gpu/command_buffer/tests/gl_manager.cc

Index: gpu/command_buffer/tests/gl_manager.cc
diff --git a/gpu/command_buffer/tests/gl_manager.cc b/gpu/command_buffer/tests/gl_manager.cc
index 912d721d8d42180ae8ff76b58f37968a18156dc1..14db7734484cd868a4d0afb2fff488b4dfd0a0cb 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -93,15 +93,18 @@ void GLManager::Setup(
   attribs.push_back(16);
   attribs.push_back(EGL_NONE);
 
-  command_buffer_.reset(new CommandBufferService);
+  if (!context_group) {
+    context_group = new gles2::ContextGroup(
+        mailbox_manager_.get(), kBindGeneratesResource);
+  }
+
+  decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group));
+
+  command_buffer_.reset(new CommandBufferService(
+      decoder_->GetContextGroup()->transfer_buffer_manager()));
   ASSERT_TRUE(command_buffer_->Initialize())
       << "could not create command buffer service";
 
-  decoder_.reset(::gpu::gles2::GLES2Decoder::Create(
-      context_group ? context_group :
-          new gles2::ContextGroup(
-              mailbox_manager_.get(), kBindGeneratesResource)));
-
   gpu_scheduler_.reset(new GpuScheduler(command_buffer_.get(),
                                         decoder_.get(),
                                         decoder_.get()));