Added activity logging for ext APIs with custom bindings

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
new file mode 100644
index 0000000000000000000000000000000000000000..f19e3bae601f089eb5fc5147ec55ed92bf8e260c
--- /dev/null
+++ b/chrome/renderer/extensions/api_activity_logger.h
@@ -0,0 +1,36 @@
+// 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 "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();
+
+  // 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)
+  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_
+