Don't mark a WebMediaPlayer as idle until it has size and first frame.

content/renderer/media/renderer_webmediaplayer_delegate_browsertest.cc

Index: content/renderer/media/renderer_webmediaplayer_delegate_browsertest.cc
diff --git a/content/renderer/media/renderer_webmediaplayer_delegate_browsertest.cc b/content/renderer/media/renderer_webmediaplayer_delegate_browsertest.cc
index 8ab298ae33c9c11389d203d94990fc01e1689ec4..0fd0840d0f17992be384a1c5caca611466e738a3 100644
--- a/content/renderer/media/renderer_webmediaplayer_delegate_browsertest.cc
+++ b/content/renderer/media/renderer_webmediaplayer_delegate_browsertest.cc
@@ -160,16 +160,20 @@ TEST_F(RendererWebMediaPlayerDelegateTest, IdleDelegatesAreSuspended) {
                                                         &tick_clock);
   EXPECT_FALSE(delegate_manager_->IsIdleCleanupTimerRunningForTesting());
 
+  // Just adding an observer should not start the idle timer.
   testing::StrictMock<MockWebMediaPlayerDelegateObserver> observer_1;
   const int delegate_id_1 = delegate_manager_->AddObserver(&observer_1);
-  EXPECT_TRUE(delegate_manager_->IsIdleCleanupTimerRunningForTesting());
+  EXPECT_FALSE(delegate_manager_->IsIdleCleanupTimerRunningForTesting());
+
+  // Starting playback should not have an idle timer.
   delegate_manager_->DidPlay(delegate_id_1, true, true, false,
                              base::TimeDelta());
   EXPECT_FALSE(delegate_manager_->IsIdleCleanupTimerRunningForTesting());
 
-  // Never playing should count as idle.
+  // Never calling DidPlay() but calling DidPause() should count as idle.
   testing::StrictMock<MockWebMediaPlayerDelegateObserver> observer_2;
   const int delegate_id_2 = delegate_manager_->AddObserver(&observer_2);
+  delegate_manager_->DidPause(delegate_id_2, false);
   EXPECT_TRUE(delegate_manager_->IsIdleCleanupTimerRunningForTesting());
 
   // Adding the observer should instantly queue the timeout task, once run the