Clean up plug-in placeholders:

chrome/renderer/plugin_uma.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 CHROME_RENDERER_PLUGIN_UMA_H_
-#define CHROME_RENDERER_PLUGIN_UMA_H_
-
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/singleton.h"
-#include "googleurl/src/gurl.h"
-
-// Used to send UMA data about missing plugins to UMA histogram server. Method
-// ReportPluginMissing should be called whenever plugin that is not available or
-// enabled is called. We try to determine plugin's type by requested mime type,
-// or, if mime type is unknown, by plugin's src url.
-class MissingPluginReporter {
- public:
-  // This must be sync'd with histogram values.
-  enum PluginType {
-    WINDOWS_MEDIA_PLAYER = 0,
-    SILVERLIGHT = 1,
-    REALPLAYER = 2,
-    JAVA = 3,
-    QUICKTIME = 4,
-    OTHER = 5
-  };
-
-  // Sends UMA data, i.e. plugin's type.
-  class UMASender {
-   public:
-    virtual ~UMASender() {}
-    virtual void SendPluginUMA(PluginType plugin_type) = 0;
-  };
-
-  // Returns singleton instance.
-  static MissingPluginReporter* GetInstance();
-
-  void ReportPluginMissing(std::string plugin_mime_type,
-                           const GURL& plugin_src);
-
-  // Used in testing.
-  void SetUMASender(UMASender* sender);
-
- private:
-  friend struct DefaultSingletonTraits<MissingPluginReporter>;
-
-  MissingPluginReporter();
-  ~MissingPluginReporter();
-
-  static bool CompareCStrings(const char* first, const char* second);
-  bool CStringArrayContainsCString(const char** array,
-                                   size_t array_size,
-                                   const char* str);
-  // Extracts file extension from url.
-  void ExtractFileExtension(const GURL& src, std::string* extension);
-
-  // Converts plugin's src to plugin type.
-  PluginType SrcToPluginType(const GURL& src);
-  // Converts plugin's mime type to plugin type.
-  PluginType MimeTypeToPluginType(const std::string& mime_type);
-
-  scoped_ptr<UMASender> report_sender_;
-
-  DISALLOW_COPY_AND_ASSIGN(MissingPluginReporter);
-};
-
-#endif  // CHROME_RENDERER_PLUGIN_UMA_H_
-