Pipe impl_latency_takes_priority_ to the RenderScheduler.

cc/scheduler/scheduler_unittest.cc

 // Copyright 2011 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/scheduler/scheduler.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 2985 matching lines @@
   scheduler_->SetAuthoritativeVSyncInterval(authoritative_interval);
 
   EXPECT_SCOPED(AdvanceFrame());
 
   // At the next BeginFrame, authoritative interval is used instead of previous
   // interval.
   EXPECT_NE(initial_interval, scheduler_->BeginImplFrameInterval());
   EXPECT_EQ(authoritative_interval, scheduler_->BeginImplFrameInterval());
 }
 
+TEST_F(SchedulerTest, ImplLatencyTakesPriority) {
+  SetUpScheduler(true);
+  scheduler_->SetImplLatencyTakesPriority(true);
+  EXPECT_TRUE(scheduler_->ImplLatencyTakesPriority());
+
+  scheduler_->SetImplLatencyTakesPriority(false);
+  EXPECT_FALSE(scheduler_->ImplLatencyTakesPriority());
+}
+
+TEST_F(SchedulerTest, BeginFrameArgs_OnCriticalPath) {
+  scheduler_settings_.use_external_begin_frame_source = true;
+  SetUpScheduler(true);
+
+  scheduler_->SetImplLatencyTakesPriority(false);
+  scheduler_->SetChildrenNeedBeginFrames(true);
+
+  EXPECT_SCOPED(AdvanceFrame());
+  EXPECT_TRUE(client_->begin_frame_is_sent_to_children());
+  EXPECT_TRUE(client_->begin_frame_args_sent_to_children().on_critical_path);
+}
+
+TEST_F(SchedulerTest, BeginFrameArgs_NotOnCriticalPath) {
+  scheduler_settings_.use_external_begin_frame_source = true;
+  SetUpScheduler(true);
+
+  scheduler_->SetImplLatencyTakesPriority(true);
+  scheduler_->SetChildrenNeedBeginFrames(true);
+
+  EXPECT_SCOPED(AdvanceFrame());
+  EXPECT_TRUE(client_->begin_frame_is_sent_to_children());
+  EXPECT_FALSE(client_->begin_frame_args_sent_to_children().on_critical_path);
+}
+
 }  // namespace
 }  // namespace cc