Initial skeleton for System Indicator API

chrome/browser/extensions/api/extension_action/extension_actions_api.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 CHROME_BROWSER_EXTENSIONS_API_EXTENSION_ACTION_EXTENSION_ACTIONS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_EXTENSION_ACTION_EXTENSION_ACTIONS_API_H_
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/extension_function.h"
@@ skipping 49 matching lines @@
 class ExtensionActionFunction : public SyncExtensionFunction {
  public:
   static bool ParseCSSColorString(const std::string& color_string,
                                   SkColor* result);
 
  protected:
   ExtensionActionFunction();
   virtual ~ExtensionActionFunction();
   virtual bool RunImpl() OVERRIDE;
   virtual bool RunExtensionAction() = 0;
+  virtual bool ValidateArguments();
+
   void NotifyChange();
   void NotifyBrowserActionChange();
   void NotifyLocationBarChange();
+  void NotifyStatusTrayChange();
   bool SetVisible(bool visible);
 
   // Extension-related information for |tab_id_|.
   // CHECK-fails if there is no tab.
   extensions::TabHelper& tab_helper() const;
 
   // All the extension action APIs take a single argument called details that
   // is a dictionary.
   base::DictionaryValue* details_;
 
@@ skipping 88 matching lines @@
 
 // getBadgeBackgroundColor
 class ExtensionActionGetBadgeBackgroundColorFunction
     : public ExtensionActionFunction {
  protected:
   virtual ~ExtensionActionGetBadgeBackgroundColorFunction() {}
   virtual bool RunExtensionAction() OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_EXTENSION_ACTION_EXTENSION_ACTIONS_API_H_