[content]: Add CanExceedIdleDeadlineIfRequired function to RendererScheduler.

content/renderer/scheduler/renderer_scheduler_impl_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/renderer/scheduler/renderer_scheduler_impl.h"
 
 #include "base/callback.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/test/ordered_simple_task_runner.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 1146 matching lines @@
   scheduler_->BeginFrameNotExpectedSoon();
   RunUntilIdle();
   EXPECT_EQ(0, run_count);
 
   // The long idle period should start after the touchstart policy has finished.
   clock_->AdvanceNow(priority_escalation_after_input_duration());
   RunUntilIdle();
   EXPECT_EQ(1, run_count);
 }
 
+TEST_F(RendererSchedulerImplTest, TestIsMaximumIdleDeadline) {
+  base::TimeTicks short_deadline =
+      clock_->Now() + base::TimeDelta::FromMilliseconds(10);
+  EXPECT_FALSE(scheduler_->IsMaximumIdleDeadline(short_deadline));
+  base::TimeTicks long_deadline =
+      clock_->Now() + maximum_idle_period_duration();
+  EXPECT_TRUE(scheduler_->IsMaximumIdleDeadline(long_deadline));
+  base::TimeTicks within_slop_long_deadline =
+      clock_->Now() - base::TimeDelta::FromMilliseconds(1) +
+      maximum_idle_period_duration();
+  EXPECT_TRUE(scheduler_->IsMaximumIdleDeadline(within_slop_long_deadline));
+}
+
 }  // namespace content