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

gpu/command_buffer/service/buffer_manager.h

Index: gpu/command_buffer/service/buffer_manager.h
diff --git a/gpu/command_buffer/service/buffer_manager.h b/gpu/command_buffer/service/buffer_manager.h
index 7ccb3f0660b043476fc89b37c334c5ee2ae2b5bf..2e54eaeb3fe5bd992425075002bb9097516eb3da 100644
--- a/gpu/command_buffer/service/buffer_manager.h
+++ b/gpu/command_buffer/service/buffer_manager.h
@@ -219,9 +219,13 @@ class GPU_EXPORT BufferManager {
     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);