Add missing TaskScheduler on tests using RendereWidgetHostImpl

content/browser/frame_host/render_widget_host_view_child_frame_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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/scoped_task_scheduler.h"
 #include "build/build_config.h"
 #include "cc/surfaces/compositor_frame_sink_support.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_manager.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "cc/test/begin_frame_args_test.h"
 #include "cc/test/fake_external_begin_frame_source.h"
 #include "content/browser/compositor/test/no_transport_image_transport_factory.h"
 #include "content/browser/frame_host/cross_process_frame_connector.h"
@@ skipping 40 matching lines @@
     return nullptr;
   }
 
   cc::SurfaceInfo last_surface_info_;
 };
 
 }  // namespace
 
 class RenderWidgetHostViewChildFrameTest : public testing::Test {
  public:
-  RenderWidgetHostViewChildFrameTest() {}
+  RenderWidgetHostViewChildFrameTest() : task_scheduler_(&message_loop_) {}
 
   void SetUp() override {
     browser_context_.reset(new TestBrowserContext);
 
 // ImageTransportFactory doesn't exist on Android.
 #if !defined(OS_ANDROID)
     ImageTransportFactory::InitializeForUnitTests(
         base::WrapUnique(new NoTransportImageTransportFactory));
 #endif
 
@@ skipping 31 matching lines @@
   cc::LocalSurfaceId GetLocalSurfaceId() const {
     return view_->local_surface_id_;
   }
 
   void ClearCompositorSurfaceIfNecessary() {
     view_->ClearCompositorSurfaceIfNecessary();
   }
 
  protected:
   base::MessageLoopForUI message_loop_;
+
+  // TaskScheduler is used by RenderWidgetHostImpl constructor.
+  base::test::ScopedTaskScheduler task_scheduler_;
+
   std::unique_ptr<BrowserContext> browser_context_;
   MockRenderWidgetHostDelegate delegate_;
 
   // Tests should set these to NULL if they've already triggered their
   // destruction.
   RenderWidgetHostImpl* widget_host_;
   RenderWidgetHostViewChildFrame* view_;
   MockCrossProcessFrameConnector* test_frame_connector_;
 
  private:
@@ skipping 138 matching lines @@
     // Explicit ack through OnBeginFrameDidNotSwap is forwarded.
     cc::BeginFrameAck ack(source_id, 6, 4, false);
     view_->OnBeginFrameDidNotSwap(ack);
     EXPECT_EQ(ack, source.LastAckForObserver(view_->support_.get()));
   }
 
   view_->SetNeedsBeginFrames(false);
 }
 
 }  // namespace content