Getting rid of CompositorFrameMetadata::satisfies_sequences

cc/layers/surface_layer.cc

Index: cc/layers/surface_layer.cc
diff --git a/cc/layers/surface_layer.cc b/cc/layers/surface_layer.cc
index 0f8bd3380be1aa873bf5ed197dcafabad45a9c51..dd16ed2dcee81aead883856e6089670e02846e14 100644
--- a/cc/layers/surface_layer.cc
+++ b/cc/layers/surface_layer.cc
@@ -7,6 +7,7 @@
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/layers/surface_layer_impl.h"
 #include "cc/output/swap_promise.h"
@@ -18,16 +19,21 @@ namespace cc {
 
 class SatisfySwapPromise : public SwapPromise {
  public:
-  SatisfySwapPromise(SurfaceSequence sequence,
-                     const SurfaceLayer::SatisfyCallback& satisfy_callback)
-      : sequence_(sequence), satisfy_callback_(satisfy_callback) {}
+  SatisfySwapPromise(
+      SurfaceSequence sequence,

[Fady Samuel, 2016/12/08 18:01:33]

nit: const SurfaceSequence& sequence

+      const SurfaceLayer::SatisfyCallback& satisfy_callback,
+      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner)
+      : sequence_(sequence),
+        satisfy_callback_(satisfy_callback),
+        main_task_runner_(main_task_runner) {}

[dcheng, 2016/12/08 19:25:38]

NIt: std::move() this

 
   ~SatisfySwapPromise() override {}
 
  private:
   void DidActivate() override {}
   void DidSwap(CompositorFrameMetadata* metadata) override {
-    metadata->satisfies_sequences.push_back(sequence_.sequence);
+    main_task_runner_->PostTask(FROM_HERE,
+                                base::Bind(satisfy_callback_, sequence_));
   }
 
   DidNotSwapAction DidNotSwap(DidNotSwapReason reason) override {
@@ -38,6 +44,7 @@ class SatisfySwapPromise : public SwapPromise {
 
   SurfaceSequence sequence_;
   SurfaceLayer::SatisfyCallback satisfy_callback_;
+  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(SatisfySwapPromise);
 };
@@ -118,7 +125,8 @@ void SurfaceLayer::SatisfyDestroySequence() {
     return;
   DCHECK(destroy_sequence_.is_valid());
   std::unique_ptr<SatisfySwapPromise> satisfy(
-      new SatisfySwapPromise(destroy_sequence_, satisfy_callback_));
+      new SatisfySwapPromise(destroy_sequence_, satisfy_callback_,
+                             base::ThreadTaskRunnerHandle::Get()));
   layer_tree_host()->GetSwapPromiseManager()->QueueSwapPromise(
       std::move(satisfy));
   destroy_sequence_ = SurfaceSequence();