Adding support for collecting anonymous UMA stats for missing plugins.

We keep track of:
  * Windows media player (appluication/x-mplayer2)
  * Silverlight (application/x-silverlight*)
  * RealPlayer (audio/x-pn-realaudio*)
  * Java (application/x-java-applet)
  * QuickTime (video/quicktime)

TEST=Ran PluginUMATest.* unit_test
BUG=chromium-os:16696
Review URL: http://codereview.chromium.org/7351023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93426 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 70 insertions, 0 deletions

diff --git a/chrome/renderer/plugin_uma.h b/chrome/renderer/plugin_uma.h
new file mode 100644
index 0000000..411a8ae
--- /dev/null
+++ b/chrome/renderer/plugin_uma.h
@@ -0,0 +1,70 @@
+// 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_
+