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diff --git a/chrome/default_plugin/plugin_impl_aura.h b/chrome/default_plugin/plugin_impl_aura.h
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+++ b/chrome/default_plugin/plugin_impl_aura.h
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+// 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 CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_AURA_H_
+#define CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_AURA_H_
+#pragma once
+
+#include <string>
+
+#include "chrome/default_plugin/plugin_installer_base.h"
+#include "third_party/npapi/bindings/npapi.h"
+#include "ui/gfx/native_widget_types.h"
+
+// Provides the plugin installation functionality. This class is
+// instantiated with the information like the mime type of the
+// target plugin, the display mode, etc.
+class PluginInstallerImpl : public PluginInstallerBase {
+ public:
+  // mode is the plugin instantiation mode, i.e. whether it is a full
+  // page plugin (NP_FULL) or an embedded plugin (NP_EMBED)
+  explicit PluginInstallerImpl(int16 mode);
+  virtual ~PluginInstallerImpl();
+
+  // Initializes the plugin with the instance information, mime type
+  // and the list of parameters passed down to the plugin from the webpage.
+  //
+  // Parameters:
+  // module_handle
+  //   The handle to the dll in which this object is instantiated.
+  // instance
+  //   The plugins opaque instance handle.
+  // mime_type
+  //   Identifies the third party plugin which would be eventually installed.
+  // argc
+  //   Indicates the count of arguments passed in from the webpage.
+  // argv
+  //   Pointer to the arguments.
+  // Returns true on success.
+  bool Initialize(void* module_handle, NPP instance, NPMIMEType mime_type,
+                  int16 argc, char* argn[], char* argv[]);
+
+  // Informs the plugin of its window information.
+  //
+  // Parameters:
+  // window_info
+  //   The window info passed to npapi.
+  bool NPP_SetWindow(NPWindow* window_info);
+
+  // Destroys the install dialog.
+  void Shutdown();
+
+  // Starts plugin download. Spawns the plugin installer after it is
+  // downloaded.
+  void DownloadPlugin();
+
+  // Indicates that the plugin download was cancelled.
+  void DownloadCancelled();
+
+  // Initializes the plugin download stream.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the new stream being created.
+  void NewStream(NPStream* stream);
+
+  // Uninitializes the plugin download stream.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the stream being destroyed.
+  // reason
+  //   Indicates why the stream is being destroyed.
+  //
+  void DestroyStream(NPStream* stream, NPError reason);
+
+  // Determines whether the plugin is ready to accept data.
+  // We only accept data when we have initiated a download for the plugin
+  // database.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the stream being destroyed.
+  // Returns true if the plugin is ready to accept data.
+  bool WriteReady(NPStream* stream);
+
+  // Delivers data to the plugin instance.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the stream being destroyed.
+  // offset
+  //   Indicates the data offset.
+  // buffer_length
+  //   Indicates the length of the data buffer.
+  // buffer
+  //   Pointer to the actual buffer.
+  // Returns the number of bytes actually written, 0 on error.
+  int32 Write(NPStream* stream, int32 offset, int32 buffer_length,
+              void* buffer);
+
+  // Handles notifications received in response to GetURLNotify calls issued
+  // by the plugin.
+  //
+  // Parameters:
+  // url
+  //   Pointer to the URL.
+  // reason
+  //   Describes why the notification was sent.
+  void URLNotify(const char* url, NPReason reason);
+
+  // Used by the renderer to pass events (for e.g. input events) to the plugin.
+  int16 NPP_HandleEvent(void* event);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PluginInstallerImpl);
+};
+
+#endif  // CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_AURA_H_