Add private API to notify end of initialization.

chrome/browser/chromeos/input_method/input_method_engine.h

Index: chrome/browser/chromeos/input_method/input_method_engine.h
diff --git a/chrome/browser/chromeos/input_method/input_method_engine.h b/chrome/browser/chromeos/input_method/input_method_engine.h
index 2993cef120fe0a8cf31373f6c0ada2c8da38af33..320b2bf55747e6e5dde0f9992b6252cbab3954b1 100644
--- a/chrome/browser/chromeos/input_method/input_method_engine.h
+++ b/chrome/browser/chromeos/input_method/input_method_engine.h
@@ -153,6 +153,11 @@ class InputMethodEngine {
 
   virtual ~InputMethodEngine() {}
 
+  // Called when the input metho initialization is done.
+  // This function is called from private API.
+  // TODO(nona): Remove this function.
+  virtual void StartIme() = 0;
+
   // Set the current composition and associated properties.
   virtual bool SetComposition(int context_id,
                               const char* text,