Remove unused CompositorFrameSink capability

cc/output/compositor_frame_sink.h

 // Copyright 2012 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.
 
 #ifndef CC_OUTPUT_COMPOSITOR_FRAME_SINK_H_
 #define CC_OUTPUT_COMPOSITOR_FRAME_SINK_H_
 
 #include <deque>
 #include <memory>
 
@@ skipping 33 matching lines @@
 //   2. Passed to the compositor thread and bound to a client via BindToClient.
 //      From here on, it will only be used on the compositor thread.
 //   3. If the 3D context is lost, then the compositor will delete the output
 //      surface (on the compositor thread) and go back to step 1.
 class CC_EXPORT CompositorFrameSink
     : public base::trace_event::MemoryDumpProvider {
  public:
   struct Capabilities {
     Capabilities() = default;
 
-    // TODO(enne): Remove this since everything uses begin frames now, but it
-    // causes some racey unit tests to fail.
-    bool adjust_deadline_for_parent = true;
-
     // Whether ForceReclaimResources can be called to reclaim all resources
     // from the CompositorFrameSink.
     bool can_force_reclaim_resources = false;
     // True if sync points for resources are needed when swapping delegated
     // frames.
     bool delegated_sync_points_required = true;
   };
 
   // Constructor for GL-based and/or software compositing.
   explicit CompositorFrameSink(
@@ skipping 74 matching lines @@
   void DetachFromClientInternal();
 
   base::WeakPtrFactory<CompositorFrameSink> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorFrameSink);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_COMPOSITOR_FRAME_SINK_H_