cc: Control defer_commits logic by Scheduler

cc/trees/layer_tree_host_unittest.cc

Index: cc/trees/layer_tree_host_unittest.cc
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index ab1224ef1f9a28ba9193145db3f7db77a852633a..a3c37ed627e3908fda61e47fbbaf96ee8b0425d0 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -2029,22 +2029,34 @@ SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestContinuousInvalidate);
 class LayerTreeHostTestDeferCommits : public LayerTreeHostTest {
  public:
   LayerTreeHostTestDeferCommits()
-      : num_commits_deferred_(0), num_complete_commits_(0) {}
+      : num_will_begin_impl_frame_(0),
+        num_send_begin_main_frame_(0) {}
 
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 
-  void DidDeferCommit() override {
-    num_commits_deferred_++;
-    layer_tree_host()->SetDeferCommits(false);
+  void WillBeginImplFrame(const BeginFrameArgs& args) override {
+    num_will_begin_impl_frame_++;
+    switch (num_will_begin_impl_frame_) {
+      case 1:
+        break;
+      case 2:
+        PostSetNeedsCommitToMainThread();
+        break;
+      case 3:
+        PostSetDeferCommitsToMainThread(false);
+        break;
+      default:
+        // Sometimes |num_will_begin_impl_frame_| will be greater than 3 if the
+        // main thread is slow to respond.
+        break;
+    }
   }
 
-  void DidCommit() override {
-    num_complete_commits_++;
-    switch (num_complete_commits_) {
+  void ScheduledActionSendBeginMainFrame() override {
+    num_send_begin_main_frame_++;
+    switch (num_send_begin_main_frame_) {
       case 1:
-        EXPECT_EQ(0, num_commits_deferred_);
-        layer_tree_host()->SetDeferCommits(true);
-        PostSetNeedsCommitToMainThread();
+        PostSetDeferCommitsToMainThread(true);
         break;
       case 2:
         EndTest();
@@ -2056,13 +2068,13 @@ class LayerTreeHostTestDeferCommits : public LayerTreeHostTest {
   }
 
   void AfterTest() override {
-    EXPECT_EQ(1, num_commits_deferred_);
-    EXPECT_EQ(2, num_complete_commits_);
+    EXPECT_GE(3, num_will_begin_impl_frame_);
+    EXPECT_EQ(2, num_send_begin_main_frame_);
   }
 
  private:
-  int num_commits_deferred_;
-  int num_complete_commits_;
+  int num_will_begin_impl_frame_;
+  int num_send_begin_main_frame_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestDeferCommits);
@@ -4798,22 +4810,24 @@ class LayerTreeHostTestKeepSwapPromise : public LayerTreeTest {
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestKeepSwapPromise);
 
-class LayerTreeHostTestBreakSwapPromiseForVisibilityAbortedCommit
+class LayerTreeHostTestBreakSwapPromiseForVisibility
     : public LayerTreeHostTest {
  protected:
   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 
-  void DidCommit() override {
-    layer_tree_host()->SetDeferCommits(true);
-    layer_tree_host()->SetNeedsCommit();
-  }
-
-  void DidDeferCommit() override {
+  void SetVisibleFalseAndQueueSwapPromise() {
     layer_tree_host()->SetVisible(false);
     scoped_ptr<SwapPromise> swap_promise(
         new TestSwapPromise(&swap_promise_result_));
     layer_tree_host()->QueueSwapPromise(swap_promise.Pass());
-    layer_tree_host()->SetDeferCommits(false);
+  }
+
+  void ScheduledActionWillSendBeginMainFrame() override {
+    MainThreadTaskRunner()->PostTask(
+        FROM_HERE,
+        base::Bind(&LayerTreeHostTestBreakSwapPromiseForVisibility
+                       ::SetVisibleFalseAndQueueSwapPromise,
+            base::Unretained(this)));
   }
 
   void BeginMainFrameAbortedOnThread(LayerTreeHostImpl* host_impl,
@@ -4834,27 +4848,33 @@ class LayerTreeHostTestBreakSwapPromiseForVisibilityAbortedCommit
   TestSwapPromiseResult swap_promise_result_;
 };
 
-SINGLE_AND_MULTI_THREAD_TEST_F(
-    LayerTreeHostTestBreakSwapPromiseForVisibilityAbortedCommit);
+SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestBreakSwapPromiseForVisibility);
 
-class LayerTreeHostTestBreakSwapPromiseForContextAbortedCommit
-    : public LayerTreeHostTest {
+class LayerTreeHostTestBreakSwapPromiseForContext : public LayerTreeHostTest {
  protected:
-  void BeginTest() override { PostSetNeedsCommitToMainThread(); }
-
-  void DidCommit() override {
-    if (TestEnded())
-      return;
-    layer_tree_host()->SetDeferCommits(true);
-    layer_tree_host()->SetNeedsCommit();
+  LayerTreeHostTestBreakSwapPromiseForContext()
+      : output_surface_lost_triggered_(false) {
   }
 
-  void DidDeferCommit() override {
+  void BeginTest() override { PostSetNeedsCommitToMainThread(); }
+
+  void LoseOutputSurfaceAndQueueSwapPromise() {
     layer_tree_host()->DidLoseOutputSurface();
     scoped_ptr<SwapPromise> swap_promise(
         new TestSwapPromise(&swap_promise_result_));
     layer_tree_host()->QueueSwapPromise(swap_promise.Pass());
-    layer_tree_host()->SetDeferCommits(false);
+  }
+
+  void ScheduledActionWillSendBeginMainFrame() override {
+    if (output_surface_lost_triggered_)
+      return;
+    output_surface_lost_triggered_ = true;
+
+    MainThreadTaskRunner()->PostTask(
+        FROM_HERE,
+        base::Bind(&LayerTreeHostTestBreakSwapPromiseForContext
+                       ::LoseOutputSurfaceAndQueueSwapPromise,
+                   base::Unretained(this)));
   }
 
   void BeginMainFrameAbortedOnThread(LayerTreeHostImpl* host_impl,
@@ -4874,11 +4894,12 @@ class LayerTreeHostTestBreakSwapPromiseForContextAbortedCommit
     }
   }
 
+  bool output_surface_lost_triggered_;
   TestSwapPromiseResult swap_promise_result_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
-    LayerTreeHostTestBreakSwapPromiseForContextAbortedCommit);
+    LayerTreeHostTestBreakSwapPromiseForContext);
 
 class SimpleSwapPromiseMonitor : public SwapPromiseMonitor {
  public: