Add missing (and remove superfluous) 'explicit' from constructors.

gpu/command_buffer/client/transfer_buffer.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_CLIENT_TRANSFER_BUFFER_H_
 #define GPU_COMMAND_BUFFER_CLIENT_TRANSFER_BUFFER_H_
 
 #include "../../gpu_export.h"
 #include "../common/buffer.h"
 #include "../common/compiler_specific.h"
@@ skipping 69 matching lines @@
   virtual void* Alloc(unsigned int size) = 0;
 
   virtual RingBuffer::Offset GetOffset(void* pointer) const = 0;
 
   virtual void FreePendingToken(void* p, unsigned int token) = 0;
 };
 
 // Class that manages the transfer buffer.
 class GPU_EXPORT TransferBuffer : public TransferBufferInterface {
  public:
-  TransferBuffer(CommandBufferHelper* helper);
+  explicit TransferBuffer(CommandBufferHelper* helper);
   virtual ~TransferBuffer();
 
   // Overridden from TransferBufferInterface.
   virtual bool Initialize(
       unsigned int default_buffer_size,
       unsigned int result_size,
       unsigned int min_buffer_size,
       unsigned int max_buffer_size,
       unsigned int alignment,
       unsigned int size_to_flush) OVERRIDE;
@@ skipping 123 matching lines @@
   }
 
   unsigned int num_elements() const {
     return size() / sizeof(T);
   }
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_TRANSFER_BUFFER_H_