Remove GpuMemoryBuffer::IsInUseByMacOSWindowServer

ui/gfx/gpu_memory_buffer.h

 // Copyright 2013 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 UI_GFX_GPU_MEMORY_BUFFER_H_
 #define UI_GFX_GPU_MEMORY_BUFFER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 61 matching lines @@
   virtual bool Map() = 0;
 
   // Returns a pointer to the memory address of a plane. Buffer must have been
   // successfully mapped using a call to Map() before calling this function.
   virtual void* memory(size_t plane) = 0;
 
   // Unmaps the buffer. It's illegal to use any pointer returned by memory()
   // after this has been called.
   virtual void Unmap() = 0;
 
-  // Returns true if the buffer is currently being read from by the system's
-  // window server, and should not be written to.
-  // TODO(ccameron): This is specific to the Mac OS WindowServer process, and
-  // should be merged with synchronization mechanisms from other platforms, if
-  // possible.
-  virtual bool IsInUseByMacOSWindowServer() const;
-
   // Returns the size for the buffer.
   virtual Size GetSize() const = 0;
 
   // Returns the format for the buffer.
   virtual BufferFormat GetFormat() const = 0;
 
   // Fills the stride in bytes for each plane of the buffer. The stride of
   // plane K is stored at index K-1 of the |stride| array.
   virtual int stride(size_t plane) const = 0;
 
   // Returns a unique identifier associated with buffer.
   virtual GpuMemoryBufferId GetId() const = 0;
 
   // Returns a platform specific handle for this buffer.
   virtual GpuMemoryBufferHandle GetHandle() const = 0;
 
   // Type-checking downcast routine.
   virtual ClientBuffer AsClientBuffer() = 0;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GPU_MEMORY_BUFFER_H_