Fix resource leaks in CDM implementation.

ppapi/cpp/dev/buffer_dev.cc

 // 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.
 
 #include "ppapi/cpp/dev/buffer_dev.h"
 
 #include "ppapi/c/dev/ppb_buffer_dev.h"
 #include "ppapi/cpp/instance_handle.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
@@ skipping 25 matching lines @@
     : data_(NULL),
       size_(0) {
   if (!has_interface<PPB_Buffer_Dev>())
     return;
 
   PassRefFromConstructor(get_interface<PPB_Buffer_Dev>()->Create(
       instance.pp_instance(), size));
   Init();
 }
 
+Buffer_Dev::Buffer_Dev(PassRef, PP_Resource resource)
+    : Resource(PassRef(), resource) {
+  Init();
+}
+
 Buffer_Dev::~Buffer_Dev() {
   get_interface<PPB_Buffer_Dev>()->Unmap(pp_resource());
 }
 
 Buffer_Dev& Buffer_Dev::operator=(const Buffer_Dev& rhs) {
   Resource::operator=(rhs);
   Init();
   return *this;
 }
 
 void Buffer_Dev::Init() {
   if (!get_interface<PPB_Buffer_Dev>()->Describe(pp_resource(), &size_) ||
       !(data_ = get_interface<PPB_Buffer_Dev>()->Map(pp_resource()))) {
     data_ = NULL;
     size_ = 0;
   }
 }
 
 }  // namespace pp