Added ActivityLog tests and associated bugfixes/extra logging.

chrome/renderer/extensions/api_activity_logger.h

 // Copyright (c) 2013 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_EXTENSIONS_API_ACTIVITY_LOGGER_H_
 #define CHROME_RENDERER_EXTENSIONS_API_ACTIVITY_LOGGER_H_
 
 #include <string>
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 #include "chrome/renderer/extensions/dispatcher.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 // Used to log extension API calls that are implemented with custom bindings.
 // The events are sent via IPC to extensions::ActivityLog for recording and
 // display.
 class APIActivityLogger : public ChromeV8Extension {
  public:
   APIActivityLogger(Dispatcher* dispatcher, v8::Handle<v8::Context> v8_context);
 
   // This is ultimately invoked in schema_generated_bindings.js with
-  // JavaScript arguments...
-  //    arg0 - extension ID as a string
-  //    arg1 - API call name as a string
-  //    arg2 - arguments to the API call
-  //    arg3 - any extra logging info as a string (optional)
+  // JavaScript arguments. Logged as an EventAction or APIAction depending on
+  // the first argument.
+  //    arg0 - "EVENT" or "API"
+  //    arg1 - extension ID as a string
+  //    arg2 - API call name as a string
+  //    arg3 - arguments to the API call
+  //    arg4 - any extra logging info as a string (optional)
   static v8::Handle<v8::Value> LogActivity(const v8::Arguments & args);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(APIActivityLogger);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_API_ACTIVITY_LOGGER_H_