Report UMA for Shockwave Flash and Widevine CDM.

chrome/renderer/plugins/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_PLUGINS_PLUGIN_UMA_H_
 #define CHROME_RENDERER_PLUGINS_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.
+  // Make sure the enum list in tools/histogram/histograms.xml is updated with
+  // any change in this list.
   enum PluginType {
     WINDOWS_MEDIA_PLAYER = 0,
     SILVERLIGHT = 1,
     REALPLAYER = 2,
     JAVA = 3,
     QUICKTIME = 4,
-    OTHER = 5
+    OTHER = 5,  // This is obsolete and replaced by UNSUPPORTED_* types.
+    BROWSER_PLUGIN = 6,
+    SHOCKWAVE_FLASH = 7,
+    WIDEVINE_CDM = 8,
+    // NOTE: Add new plugin types only immediately above this line.
+    UNSUPPORTED_MIMETYPE = 240,
+    UNSUPPORTED_EXTENSION = 241,
+    // NOTE: Add new unsupported types only immediately above this line.
+    PLUGIN_TYPE_MAX

[ddorwin, 2013/04/05 05:32:17]

On second thought, any idea if each slot consumes some type of resource or if we
will end up with 231 empty values in the histogram? Otherwise, what's the point
of the max value?

[xhwang, 2013/04/05 19:00:09]

Moved UNSUPPORTED_* after OTHER to avoid the gap.

   };
 
   // Sends UMA data, i.e. plugin's type.
   class UMASender {
    public:
     virtual ~UMASender() {}
     virtual void SendPluginUMA(PluginType plugin_type) = 0;
   };
 
   // Returns singleton instance.
@@ skipping 23 matching lines @@
   // 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_PLUGINS_PLUGIN_UMA_H_