Revert of DirectRenderer allows empty swap rects for CommitOverlayPlanes

cc/output/renderer.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_RENDERER_H_
 #define CC_OUTPUT_RENDERER_H_
 
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/renderer_capabilities.h"
@@ skipping 16 matching lines @@
   ~RendererCapabilitiesImpl();
 
   // Capabilities copied to main thread.
   ResourceFormat best_texture_format;
   bool allow_partial_texture_updates;
   int max_texture_size;
   bool using_shared_memory_resources;
 
   // Capabilities used on compositor thread only.
   bool using_partial_swap;
-  // Whether it's valid to SwapBuffers with an empty rect. Trivially true when
-  // |using_partial_swap|.
-  bool allow_empty_swap;
   bool using_egl_image;
   bool using_image;
   bool using_discard_framebuffer;
   bool allow_rasterize_on_demand;
   int max_msaa_samples;
 
   RendererCapabilities MainThreadCapabilities() const;
 };
 
 class CC_EXPORT RendererClient {
@@ skipping 42 matching lines @@
   const RendererSettings* settings_;
   bool visible_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Renderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_RENDERER_H_