(not for commit) Create 2nd ContextProvider for Ganesh rasterization.

cc/output/output_surface.cc

 // Copyright (c) 2013 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 "cc/output/output_surface.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/output/managed_memory_policy.h"
 #include "cc/output/output_surface_client.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 
 namespace cc {
 
 OutputSurface::OutputSurface(
     const scoped_refptr<ContextProvider>& context_provider)
     : client_(NULL),
       context_provider_(context_provider),
+      worker_context_provider_(NULL),
       device_scale_factor_(-1),
       external_stencil_test_enabled_(false),
       weak_ptr_factory_(this) {
+}
+
+OutputSurface::OutputSurface(
+    const scoped_refptr<ContextProvider>& context_provider,
+    const scoped_refptr<ContextProvider>& worker_context_provider)
+    : client_(NULL),
+      context_provider_(context_provider),
+      worker_context_provider_(worker_context_provider),
+      device_scale_factor_(-1),
+      external_stencil_test_enabled_(false),
+      weak_ptr_factory_(this) {
 }
 
 OutputSurface::OutputSurface(scoped_ptr<SoftwareOutputDevice> software_device)
     : client_(NULL),
       software_device_(software_device.Pass()),
       device_scale_factor_(-1),
       external_stencil_test_enabled_(false),
       weak_ptr_factory_(this) {
 }
 
 OutputSurface::OutputSurface(
     const scoped_refptr<ContextProvider>& context_provider,
+    const scoped_refptr<ContextProvider>& worker_context_provider,
     scoped_ptr<SoftwareOutputDevice> software_device)
     : client_(NULL),
       context_provider_(context_provider),
+      worker_context_provider_(worker_context_provider),
       software_device_(software_device.Pass()),
       device_scale_factor_(-1),
       external_stencil_test_enabled_(false),
       weak_ptr_factory_(this) {
 }
 
 void OutputSurface::CommitVSyncParameters(base::TimeTicks timebase,
                                           base::TimeDelta interval) {
   TRACE_EVENT2("cc",
                "OutputSurface::CommitVSyncParameters",
@@ skipping 46 matching lines @@
   return external_stencil_test_enabled_;
 }
 
 bool OutputSurface::BindToClient(OutputSurfaceClient* client) {
   DCHECK(client);
   client_ = client;
   bool success = true;
 
   if (context_provider_.get()) {
     success = context_provider_->BindToCurrentThread();
-    if (success)
+    if (success) {
       SetUpContext3d();
+    }
+  }
+
+  if (worker_context_provider_.get()) {
+    success = worker_context_provider_->BindToCurrentThread();
+    // TODO(vmiura): Callbacks for worker context.
   }
 
   if (!success)
     client_ = NULL;
 
   return success;
 }
 
 bool OutputSurface::InitializeAndSetContext3d(
     scoped_refptr<ContextProvider> context_provider) {
@@ skipping 102 matching lines @@
   TRACE_EVENT1("cc", "OutputSurface::SetMemoryPolicy",
                "bytes_limit_when_visible", policy.bytes_limit_when_visible);
   // Just ignore the memory manager when it says to set the limit to zero
   // bytes. This will happen when the memory manager thinks that the renderer
   // is not visible (which the renderer knows better).
   if (policy.bytes_limit_when_visible)
     client_->SetMemoryPolicy(policy);
 }
 
 }  // namespace cc