[2] Adding a method to PluginFinder to get a PluginInstaller by WebPluginInfo.

chrome/browser/plugin_finder.h

 // Copyright (c) 2012 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_BROWSER_PLUGIN_FINDER_H_
 #define CHROME_BROWSER_PLUGIN_FINDER_H_
 
 #include <map>
 #include <string>
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
+#include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/string16.h"
+#include "webkit/plugins/webplugininfo.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 class GURL;
 class PluginInstaller;
 
 class PluginFinder {
  public:
   static void Get(const base::Callback<void(PluginFinder*)>& cb);
 
   // Finds a plug-in for the given MIME type and language (specified as an IETF
   // language tag, i.e. en-US) and returns the PluginInstaller for the plug-in,
   // or NULL if no plug-in is found.
   PluginInstaller* FindPlugin(const std::string& mime_type,
                               const std::string& language);
 
   // Returns the plug-in with the given identifier.
   PluginInstaller* FindPluginWithIdentifier(const std::string& identifier);
 
+  // Gets a plug-in installer using |plugin|.
+  PluginInstaller* GetPluginInstaller(const webkit::WebPluginInfo& plugin);
+
  private:
   friend struct DefaultSingletonTraits<PluginFinder>;
   friend class Singleton<PluginFinder>;
   FRIEND_TEST_ALL_PREFIXES(PluginFinderTest, JsonSyntax);
   FRIEND_TEST_ALL_PREFIXES(PluginFinderTest, PluginGroups);
 
   static PluginFinder* GetInstance();
 
   PluginFinder();
   ~PluginFinder();
 
   // Loads the plug-in information from the browser resources and parses it.
   // Returns NULL if the plug-in list couldn't be parsed.
   static base::DictionaryValue* LoadPluginList();
 
   PluginInstaller* CreateInstaller(const std::string& identifier,
                                    const base::DictionaryValue* plugin_dict);
 
   scoped_ptr<base::DictionaryValue> plugin_list_;
   std::map<std::string, PluginInstaller*> installers_;
 
+  // Note: Don't free memory for |name_insallers_| values
+  // since it holds pointers to same instances
+  // in |installers_| (Double De-allocation).
+  base::hash_map<string16, PluginInstaller*> name_installers_;
+
   DISALLOW_COPY_AND_ASSIGN(PluginFinder);
 };
 
 #endif  // CHROME_BROWSER_PLUGIN_FINDER_H_