Revert of Re-land: cc: Use worker context for one-copy tile initialization.

components/html_viewer/web_layer_tree_view_impl.cc

 // Copyright 2014 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 "components/html_viewer/web_layer_tree_view_impl.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "cc/blink/web_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/output/begin_frame_args.h"
@@ skipping 45 matching lines @@
   params.settings = &settings;
   params.task_graph_runner = task_graph_runner;
   params.main_task_runner = main_thread_compositor_task_runner_;
 
   layer_tree_host_ =
       cc::LayerTreeHost::CreateThreaded(compositor_task_runner, &params);
   DCHECK(layer_tree_host_);
 
   if (surface && gpu_service) {
     mojo::CommandBufferPtr cb;
-    mojo::CommandBufferPtr worker_cb;
     gpu_service->CreateOffscreenGLES2Context(GetProxy(&cb));
-    gpu_service->CreateOffscreenGLES2Context(GetProxy(&worker_cb));
     scoped_refptr<cc::ContextProvider> context_provider(
         new mojo::ContextProviderMojo(cb.PassInterface().PassHandle()));
-    scoped_refptr<cc::ContextProvider> worker_context_provider(
-        new mojo::ContextProviderMojo(worker_cb.PassInterface().PassHandle()));
-    output_surface_.reset(new mojo::OutputSurfaceMojo(
-        this, context_provider, worker_context_provider,
-        surface.PassInterface().PassHandle()));
+    output_surface_.reset(
+        new mojo::OutputSurfaceMojo(this, context_provider,
+                                    surface.PassInterface().PassHandle()));
   }
   layer_tree_host_->SetLayerTreeHostClientReady();
 }
 
 WebLayerTreeViewImpl::~WebLayerTreeViewImpl() {
   // Destroy the LayerTreeHost before anything else as doing so ensures we're
   // not accessed on the compositor thread (we are the LayerTreeHostClient).
   layer_tree_host_.reset();
 }
 
@@ skipping 167 matching lines @@
       base::Bind(&WebLayerTreeViewImpl::DidCreateSurfaceOnMainThread,
                  main_thread_bound_weak_ptr_,
                  id));
 }
 
 void WebLayerTreeViewImpl::DidCreateSurfaceOnMainThread(cc::SurfaceId id) {
   view_->SetSurfaceId(mojo::SurfaceId::From(id));
 }
 
 }  // namespace html_viewer