Add UMA reporting on failure to load ppapi plugins.

content/ppapi_plugin/ppapi_thread.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 CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 #define CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 
 #include <map>
 #include <string>
 
@@ skipping 31 matching lines @@
 class PpapiWebKitPlatformSupportImpl;
 
 class PpapiThread : public ChildThread,
                     public ppapi::proxy::PluginDispatcher::PluginDelegate,
                     public ppapi::proxy::PluginProxyDelegate {
  public:
   PpapiThread(const CommandLine& command_line, bool is_broker);
   virtual ~PpapiThread();
 
  private:
+  // Make sure the enum list in tools/histogram/histograms.xml is updated with
+  // any change in this list.
+  enum LoadResult {
+    LOAD_SUCCESS,
+    LOAD_FAILED,
+    ENTRY_POINT_MISSING,
+    INIT_FAILED,
+    // NOTE: Add new values only immediately above this line.
+    LOAD_RESULT_MAX  // Boundary value for UMA_HISTOGRAM_ENUMERATION.
+  };
+
   // This class finds the target PluginDispatcher for each message it receives
   // and forwards the message.
   class DispatcherMessageListener : public IPC::Listener {
    public:
     explicit DispatcherMessageListener(PpapiThread* owner);
     virtual ~DispatcherMessageListener();
 
     // IPC::Listener implementation.
     virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
@@ skipping 44 matching lines @@
   // Sets up the channel to the given renderer. On success, returns true and
   // fills the given ChannelHandle with the information from the new channel.
   bool SetupRendererChannel(base::ProcessId renderer_pid,
                             int renderer_child_id,
                             bool incognito,
                             IPC::ChannelHandle* handle);
 
   // Sets up the name of the plugin for logging using the given path.
   void SavePluginName(const base::FilePath& path);
 
+  void ReportLoadResult(const base::FilePath& path, LoadResult result);
+
   // True if running in a broker process rather than a normal plugin process.
   bool is_broker_;
 
   base::ScopedNativeLibrary library_;
 
   ppapi::PpapiPermissions permissions_;
 
   // Global state tracking for the proxy.
   ppapi::proxy::PluginGlobals plugin_globals_;
 
@@ skipping 28 matching lines @@
 #endif
 
   DispatcherMessageListener dispatcher_message_listener_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_