Fix PluginImageData and mouselock NaCl example:

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_image_data.h

 // Copyright 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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_IMAGE_DATA_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_IMAGE_DATA_H_
 
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_resource.h"
 #include "ppapi/c/ppb_image_data.h"
 
 namespace ppapi_proxy {
 
 // Implements the untrusted side of the PPB_ImageData interface.
 class PluginImageData : public PluginResource {
  public:
   PluginImageData();
+  virtual ~PluginImageData();
+
   static const PPB_ImageData* GetInterface();
 
   bool InitFromBrowserResource(PP_Resource resource);
   void* Map();
   void Unmap();
 
   const PP_ImageDataDesc& desc() const { return desc_; }
  private:
   IMPLEMENT_RESOURCE(PluginImageData);
   NACL_DISALLOW_COPY_AND_ASSIGN(PluginImageData);
   PP_ImageDataDesc desc_;
   int shm_fd_;
   int32_t shm_size_;
   void* addr_;
 };
 
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_IMAGE_DATA_H_