Read compositor VSync information from platform, when possible

content/browser/compositor/software_browser_compositor_output_surface_unittest.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 "base/message_loop/message_loop.h"
 #include "cc/output/compositor_frame.h"
 #include "content/browser/compositor/browser_compositor_output_surface_proxy.h"
 #include "content/browser/compositor/software_browser_compositor_output_surface.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/compositor/compositor.h"
 #include "ui/compositor/test/context_factories_for_test.h"
 #include "ui/gfx/vsync_provider.h"
 
 namespace {
 
 class FakeVSyncProvider : public gfx::VSyncProvider {
  public:
   FakeVSyncProvider() : call_count_(0) {}
   virtual ~FakeVSyncProvider() {}
 
@@ skipping 52 matching lines @@
   scoped_ptr<ui::Compositor> compositor_;
 
   IDMap<content::BrowserCompositorOutputSurface> surface_map_;
   scoped_refptr<content::BrowserCompositorOutputSurfaceProxy> surface_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(SoftwareBrowserCompositorOutputSurfaceTest);
 };
 
 SoftwareBrowserCompositorOutputSurfaceTest::
     SoftwareBrowserCompositorOutputSurfaceTest() {
+  // |message_loop_| is not used, but the main thread still has to exist for the
+  // compositor to use.
   message_loop_.reset(new base::MessageLoopForUI);
 }
 
 SoftwareBrowserCompositorOutputSurfaceTest::
     ~SoftwareBrowserCompositorOutputSurfaceTest() {}
 
 void SoftwareBrowserCompositorOutputSurfaceTest::SetUp() {
   ui::InitializeContextFactoryForTests(false);
   ui::Compositor::Initialize();
 
@@ skipping 15 matching lines @@
 
 scoped_ptr<content::BrowserCompositorOutputSurface>
 SoftwareBrowserCompositorOutputSurfaceTest::CreateSurface(
     scoped_ptr<cc::SoftwareOutputDevice> device) {
   return scoped_ptr<content::BrowserCompositorOutputSurface>(
       new content::SoftwareBrowserCompositorOutputSurface(
           surface_proxy_,
           device.Pass(),
           1,
           &surface_map_,
-          compositor_->GetCompositorMessageLoop(),
-          compositor_->AsWeakPtr()));
+          compositor_->vsync_manager()));
 }
 
 TEST_F(SoftwareBrowserCompositorOutputSurfaceTest, NoVSyncProvider) {
   scoped_ptr<cc::SoftwareOutputDevice> software_device(
       new cc::SoftwareOutputDevice());
   output_surface_ = CreateSurface(software_device.Pass());
 
   cc::CompositorFrame frame;
   output_surface_->SwapBuffers(&frame);
 
   EXPECT_EQ(NULL, output_surface_->software_device()->GetVSyncProvider());
 }
 
 TEST_F(SoftwareBrowserCompositorOutputSurfaceTest, VSyncProviderUpdates) {
   scoped_ptr<cc::SoftwareOutputDevice> software_device(
       new FakeSoftwareOutputDevice());
   output_surface_ = CreateSurface(software_device.Pass());
 
   FakeVSyncProvider* vsync_provider = static_cast<FakeVSyncProvider*>(
       output_surface_->software_device()->GetVSyncProvider());
   EXPECT_EQ(0, vsync_provider->call_count());
 
   cc::CompositorFrame frame;
   output_surface_->SwapBuffers(&frame);
 
   EXPECT_EQ(1, vsync_provider->call_count());
 }