Discard compositor frames from unloaded web content

content/browser/renderer_host/render_widget_host_unittest.cc

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <tuple>
 
@@ skipping 1235 matching lines @@
   EXPECT_TRUE(delegate_->unresponsive_timer_fired());
 }
 
 // Test that the rendering timeout for newly loaded content fires
 // when enough time passes without receiving a new compositor frame.
 TEST_F(RenderWidgetHostTest, NewContentRenderingTimeout) {
   host_->set_new_content_rendering_delay_for_testing(
       base::TimeDelta::FromMicroseconds(10));
 
   // Test immediate start and stop, ensuring that the timeout doesn't fire.
-  host_->StartNewContentRenderingTimeout();
+  host_->StartNewContentRenderingTimeout(0);
   host_->OnFirstPaintAfterLoad();
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
       TimeDelta::FromMicroseconds(20));
   base::RunLoop().Run();
 
   EXPECT_FALSE(host_->new_content_rendering_timeout_fired());
 
   // Test that the timer doesn't fire if it receives a stop before
   // a start.
   host_->OnFirstPaintAfterLoad();
-  host_->StartNewContentRenderingTimeout();
+  host_->StartNewContentRenderingTimeout(0);
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
       TimeDelta::FromMicroseconds(20));
   base::RunLoop().Run();
 
   EXPECT_FALSE(host_->new_content_rendering_timeout_fired());
 
   // Test with a long delay to ensure that it does fire this time.
-  host_->StartNewContentRenderingTimeout();
+  host_->StartNewContentRenderingTimeout(0);
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
       TimeDelta::FromMicroseconds(20));
   base::RunLoop().Run();
   EXPECT_TRUE(host_->new_content_rendering_timeout_fired());
 }
 
 TEST_F(RenderWidgetHostTest, TouchEmulator) {
   simulated_event_time_delta_seconds_ = 0.1;
   // Immediately ack all touches instead of sending them to the renderer.
@@ skipping 455 matching lines @@
                                       ui::LatencyInfo());
 
 
   // Tests RWHI::ForwardWheelEventWithLatencyInfo().
   SimulateWheelEventWithLatencyInfo(-5, 0, 0, true, ui::LatencyInfo());
 
   ASSERT_FALSE(host_->input_router()->HasPendingEvents());
 }
 
 }  // namespace content