Added ActivityLog tests and associated bugfixes/extra logging.

chrome/renderer/extensions/api_activity_logger.h

Index: chrome/renderer/extensions/api_activity_logger.h
diff --git a/chrome/renderer/extensions/api_activity_logger.h b/chrome/renderer/extensions/api_activity_logger.h
index a2a0fd37fae9383a84b75e3dfd3be27e6d3ad8c3..75ecfe9373f6ed28f75bbe26dbfda15ca145ccf0 100644
--- a/chrome/renderer/extensions/api_activity_logger.h
+++ b/chrome/renderer/extensions/api_activity_logger.h
@@ -20,11 +20,13 @@ class APIActivityLogger : public ChromeV8Extension {
   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: