cc: Remove FakeThread, use SingleThreadTaskRunner in scheduling classes.

This changes from using cc::Thread to base::SingleThreadTaskRunner in
FrameRateController, DelayBasedTimeSource, and ResourceUpdateController.
Then all unit tests for these classes are switched from using
cc::FakeThread to base::TestSimpleTaskRunner.

This is a step toward deleting cc::Thread and moving to using
MessageLoopProxy directly in cc.

R=piman
BUG=251134

Review URL: https://chromiumcodereview.appspot.com/17362002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207027 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 14 insertions, 0 deletions

diff --git a/base/test/test_simple_task_runner.cc b/base/test/test_simple_task_runner.cc
index 440d6a1..cc39fab 100644
--- a/base/test/test_simple_task_runner.cc
+++ b/base/test/test_simple_task_runner.cc
@@ -47,6 +47,16 @@ TestSimpleTaskRunner::GetPendingTasks() const {
   return pending_tasks_;
 }
 
+bool TestSimpleTaskRunner::HasPendingTask() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return !pending_tasks_.empty();
+}
+
+base::TimeDelta TestSimpleTaskRunner::NextPendingTaskDelay() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return pending_tasks_.front().GetTimeToRun() - base::TimeTicks();
+}
+
 void TestSimpleTaskRunner::ClearPendingTasks() {
   DCHECK(thread_checker_.CalledOnValidThread());
   pending_tasks_.clear();
diff --git a/base/test/test_simple_task_runner.h b/base/test/test_simple_task_runner.h
index 88113be..c011ea5 100644
--- a/base/test/test_simple_task_runner.h
+++ b/base/test/test_simple_task_runner.h
@@ -15,6 +15,8 @@
 
 namespace base {
 
+class TimeDelta;
+
 // TestSimpleTaskRunner is a simple TaskRunner implementation that can
 // be used for testing.  It implements SingleThreadTaskRunner as that
 // interface implements SequencedTaskRunner, which in turn implements
@@ -56,6 +58,8 @@ class TestSimpleTaskRunner : public SingleThreadTaskRunner {
   virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
 
   const std::deque<TestPendingTask>& GetPendingTasks() const;
+  bool HasPendingTask() const;
+  base::TimeDelta NextPendingTaskDelay() const;
 
   // Clears the queue of pending tasks without running them.
   void ClearPendingTasks();