Remove runtime toggling of throttling frames

cc/trees/threaded_channel_unittest.cc

Index: cc/trees/threaded_channel_unittest.cc
diff --git a/cc/trees/threaded_channel_unittest.cc b/cc/trees/threaded_channel_unittest.cc
index 79d1c65047df0b04b54e0840ac3925b71a977dab..81d28def59cb8241a41d80989020e067c798d794 100644
--- a/cc/trees/threaded_channel_unittest.cc
+++ b/cc/trees/threaded_channel_unittest.cc
@@ -73,22 +73,6 @@ class ThreadedChannelTestInitializationAndShutdown
 MULTI_THREAD_DIRECT_RENDERER_TEST_F(
     ThreadedChannelTestInitializationAndShutdown);
 
-class ThreadedChannelTestThrottleFrameProduction : public ThreadedChannelTest {
-  void BeginChannelTest() override {
-    proxy()->SetThrottleFrameProduction(true);
-  }
-
-  void SetThrottleFrameProductionOnImpl(bool throttle) override {
-    ASSERT_TRUE(throttle);
-    calls_received_++;
-    EndTest();
-  }
-
-  void AfterTest() override { EXPECT_EQ(1, calls_received_); }
-};
-
-MULTI_THREAD_DIRECT_RENDERER_TEST_F(ThreadedChannelTestThrottleFrameProduction);
-
 class ThreadedChannelTestTopControlsState : public ThreadedChannelTest {
   void BeginChannelTest() override {
     proxy()->UpdateTopControlsState(TopControlsState::BOTH,