Cleanup: Remove unneeded forward declarations in webkit/plugins/.

webkit/plugins/ppapi/ppb_buffer_impl.h

 // Copyright (c) 2011 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 WEBKIT_PLUGINS_PPAPI_PPB_BUFFER_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_BUFFER_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "ppapi/thunk/ppb_buffer_api.h"
 #include "ppapi/thunk/ppb_buffer_trusted_api.h"
 #include "ppapi/shared_impl/resource.h"
 
-struct PPB_Buffer_Dev;
-
 namespace webkit {
 namespace ppapi {
 
 class PPB_Buffer_Impl : public ::ppapi::Resource,
                         public ::ppapi::thunk::PPB_Buffer_API,
                         public ::ppapi::thunk::PPB_BufferTrusted_API {
  public:
   virtual ~PPB_Buffer_Impl();
 
   static PP_Resource Create(PP_Instance instance, uint32_t size);
@@ skipping 24 matching lines @@
   uint32_t size_;
   int map_count_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Buffer_Impl);
 };
 
 // Ensures that the given buffer is mapped, and returns it to its previous
 // mapped state in the destructor.
 class BufferAutoMapper {
  public:
-  BufferAutoMapper(::ppapi::thunk::PPB_Buffer_API* api);
+  explicit BufferAutoMapper(::ppapi::thunk::PPB_Buffer_API* api);
   ~BufferAutoMapper();
 
   // Will be NULL on failure to map.
   void* data() { return data_; }
   uint32_t size() { return size_; }
 
  private:
   ::ppapi::thunk::PPB_Buffer_API* api_;
 
   bool needs_unmap_;
 
   void* data_;
   uint32_t size_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferAutoMapper);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_BUFFER_IMPL_H_