Add workaround for Mali-400 zero-sized buffer bug.

gpu/command_buffer/service/buffer_manager.h

 // Copyright (c) 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 GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
 
 #include <map>
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
@@ skipping 201 matching lines @@
   bool SetTarget(Buffer* buffer, GLenum target);
 
   void set_allow_buffers_on_multiple_targets(bool allow) {
     allow_buffers_on_multiple_targets_ = allow;
   }
 
   size_t mem_represented() const {
     return memory_tracker_->GetMemRepresented();
   }
 
-  // Tell's for a given usage if this would be a client side array.
+  // Tells for a given usage if this would be a client side array.
   bool IsUsageClientSideArray(GLenum usage);
 
+  // Tells whether a buffer that is emulated using client-side arrays should be
+  // set to a non-zero size.
+  bool UseNonZeroSizeForClientSideArrayBuffer();
+
  private:
   friend class Buffer;
   void StartTracking(Buffer* buffer);
   void StopTracking(Buffer* buffer);
 
   // Sets the size, usage and initial data of a buffer.
   // If data is NULL buffer will be initialized to 0 if shadowed.
   void SetInfo(
       Buffer* buffer, GLsizeiptr size, GLenum usage, const GLvoid* data);
 
@@ skipping 14 matching lines @@
   bool have_context_;
   bool use_client_side_arrays_for_stream_buffers_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_