cc: Unify use of DidSwapBuffers() and did_request_swap

cc/trees/thread_proxy.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 1213 matching lines @@
     DCHECK_NE(DrawSwapReadbackResult::DRAW_SUCCESS, result.draw_result);
   }
   impl().layer_tree_host_impl->DidDrawAllLayers(frame);
 
   bool start_ready_animations = draw_frame;
   impl().layer_tree_host_impl->UpdateAnimationState(start_ready_animations);
 
   // Check for a pending CompositeAndReadback.
   if (drawing_for_readback) {
     DCHECK(!swap_requested);
-    result.did_readback = false;
+    bool did_readback = false;
     if (draw_frame) {
       if (!impl().layer_tree_host_impl->IsContextLost()) {
         impl().layer_tree_host_impl->Readback(impl().readback_request->pixels,
                                               impl().readback_request->rect);
-        result.did_readback = true;
+        did_readback = true;
       } else {
         result.draw_result = DrawSwapReadbackResult::DRAW_ABORTED_CONTEXT_LOST;
       }
     }
-    impl().readback_request->success = result.did_readback;
+    impl().readback_request->success = did_readback;
     impl().readback_request->completion.Signal();
     impl().readback_request = NULL;
   } else if (draw_frame) {
     DCHECK(swap_requested);
-    result.did_request_swap = impl().layer_tree_host_impl->SwapBuffers(frame);
+    bool did_request_swap = impl().layer_tree_host_impl->SwapBuffers(frame);
 
     // We don't know if we have incomplete tiles if we didn't actually swap.
-    if (result.did_request_swap) {
+    if (did_request_swap) {
       DCHECK(!frame.has_no_damage);
       SetSwapUsedIncompleteTileOnImplThread(frame.contains_incomplete_tile);
     }
   }
 
   // Tell the main thread that the the newly-commited frame was drawn.
   if (impl().next_frame_is_newly_committed_frame) {
     impl().next_frame_is_newly_committed_frame = false;
     Proxy::MainThreadTaskRunner()->PostTask(
         FROM_HERE,
@@ skipping 433 matching lines @@
 
   impl().timing_history.DidActivatePendingTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc