Lazy initialization for ExtensionInputMethodEventRouter

chrome/browser/chromeos/extensions/input_method_api.h

Index: chrome/browser/chromeos/extensions/input_method_api.h
diff --git a/chrome/browser/chromeos/extensions/input_method_api.h b/chrome/browser/chromeos/extensions/input_method_api.h
index 37bd9d2d1d2cd68eeb43c7e90ce93f721577ff0d..bdadd7613d906642fd0911b419e745bb877a6a40 100644
--- a/chrome/browser/chromeos/extensions/input_method_api.h
+++ b/chrome/browser/chromeos/extensions/input_method_api.h
@@ -6,7 +6,14 @@
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_INPUT_METHOD_API_H_
 
 #include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_function.h"
+#include "chrome/browser/profiles/profile_keyed_service.h"
+
+namespace chromeos {
+class ExtensionInputMethodEventRouter;
+}
 
 namespace extensions {
 
@@ -24,6 +31,32 @@ class GetInputMethodFunction : public SyncExtensionFunction {
   DECLARE_EXTENSION_FUNCTION_NAME("inputMethodPrivate.get");
 };
 
+class InputMethodAPI : public ProfileKeyedService,
+                       public extensions::EventRouter::Observer {
+ public:
+  explicit InputMethodAPI(Profile* profile);
+  virtual ~InputMethodAPI();
+
+  // Convenience method to get the InputMethodAPI for a profile.
+  static InputMethodAPI* Get(Profile* profile);
+
+  chromeos::ExtensionInputMethodEventRouter* input_method_event_router();
+
+  // ProfileKeyedService implementation.
+  virtual void Shutdown() OVERRIDE;
+
+  // EventRouter::Observer implementation.
+  virtual void OnListenerAdded(const extensions::EventListenerInfo& details)
+      OVERRIDE;
+
+ private:
+  Profile* profile_;
+
+  // Created lazily upon OnListenerAdded.
+  scoped_ptr<chromeos::ExtensionInputMethodEventRouter>
+      input_method_event_router_;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_INPUT_METHOD_API_H_