Add V8 platform API to call delayed task.

test/unittests/libplatform/default-platform-unittest.cc

Index: test/unittests/libplatform/default-platform-unittest.cc
diff --git a/test/unittests/libplatform/default-platform-unittest.cc b/test/unittests/libplatform/default-platform-unittest.cc
index d2c160e5587557c72c5c138e4a826784aaa4cdb9..ffa3199444eb4457017921bf9e622bf0a1c8ce70 100644
--- a/test/unittests/libplatform/default-platform-unittest.cc
+++ b/test/unittests/libplatform/default-platform-unittest.cc
@@ -19,6 +19,17 @@ struct MockTask : public Task {
   MOCK_METHOD0(Die, void());
 };
 
+
+class DefaultPlatformWithMockTime : public DefaultPlatform {
+ public:
+  DefaultPlatformWithMockTime() : time_(0) {}
+  double MonotonicallyIncreasingTime() override { return time_; }
+  void IncreaseTime(double seconds) { time_ += seconds; }
+
+ private:
+  double time_;
+};
+
 }  // namespace
 
 
@@ -39,5 +50,66 @@ TEST(DefaultPlatformTest, PumpMessageLoop) {
   EXPECT_FALSE(platform.PumpMessageLoop(isolate));
 }
 
+
+TEST(DefaultPlatformTest, PumpMessageLoopDelayed) {
+  InSequence s;
+
+  int dummy;
+  Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
+
+  DefaultPlatformWithMockTime platform;
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  StrictMock<MockTask>* task1 = new StrictMock<MockTask>;
+  StrictMock<MockTask>* task2 = new StrictMock<MockTask>;
+  platform.CallDelayedOnForegroundThread(isolate, task2, 100);
+  platform.CallDelayedOnForegroundThread(isolate, task1, 10);
+
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  platform.IncreaseTime(11);
+  EXPECT_CALL(*task1, Run());
+  EXPECT_CALL(*task1, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  platform.IncreaseTime(90);
+  EXPECT_CALL(*task2, Run());
+  EXPECT_CALL(*task2, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+}
+
+
+TEST(DefaultPlatformTest, PumpMessageLoopNoStarvation) {
+  InSequence s;
+
+  int dummy;
+  Isolate* isolate = reinterpret_cast<Isolate*>(&dummy);
+
+  DefaultPlatformWithMockTime platform;
+  EXPECT_FALSE(platform.PumpMessageLoop(isolate));
+
+  StrictMock<MockTask>* task1 = new StrictMock<MockTask>;
+  StrictMock<MockTask>* task2 = new StrictMock<MockTask>;
+  StrictMock<MockTask>* task3 = new StrictMock<MockTask>;
+  platform.CallOnForegroundThread(isolate, task1);
+  platform.CallDelayedOnForegroundThread(isolate, task2, 10);
+  platform.IncreaseTime(11);
+
+  EXPECT_CALL(*task1, Run());
+  EXPECT_CALL(*task1, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+
+  platform.CallOnForegroundThread(isolate, task3);
+
+  EXPECT_CALL(*task2, Run());
+  EXPECT_CALL(*task2, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+  EXPECT_CALL(*task3, Run());
+  EXPECT_CALL(*task3, Die());
+  EXPECT_TRUE(platform.PumpMessageLoop(isolate));
+}
+
 }  // namespace platform
 }  // namespace v8