IME refactoring: ChromeOS introduce input methods State.

chromeos/ime/input_method_manager.h

Index: chromeos/ime/input_method_manager.h
diff --git a/chromeos/ime/input_method_manager.h b/chromeos/ime/input_method_manager.h
index 1ef694e7018a54b48d315f9bf9d8851ca73ae72a..809ee11db879a616c98ecda4ba15e1869cc0d597 100644
--- a/chromeos/ime/input_method_manager.h
+++ b/chromeos/ime/input_method_manager.h
@@ -9,6 +9,7 @@
 #include <string>
 #include <vector>
 
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/ime/input_method_descriptor.h"
@@ -31,7 +32,7 @@ class ImeKeyboard;
 // InputMethodManager::Get().
 class CHROMEOS_EXPORT InputMethodManager {
  public:
-  enum State {
+  enum UISessionState {
     STATE_LOGIN_SCREEN = 0,
     STATE_BROWSER_SCREEN,
     STATE_LOCK_SCREEN,
@@ -61,6 +62,13 @@ class CHROMEOS_EXPORT InputMethodManager {
     virtual void CandidateWindowClosed(InputMethodManager* manager) = 0;
   };
 
+  class State : public base::RefCounted<InputMethodManager::State> {
+   protected:
+    friend base::RefCounted<InputMethodManager::State>;
+
+    virtual ~State();
+  };
+
   virtual ~InputMethodManager() {}
 
   // Gets the global instance of InputMethodManager. Initialize() must be called
@@ -199,6 +207,11 @@ class CHROMEOS_EXPORT InputMethodManager {
   // Migrates the input method id to extension-based input method id.
   virtual bool MigrateInputMethods(
       std::vector<std::string>* input_method_ids) = 0;
+
+  virtual scoped_refptr<State> CreateNewState(
+      const std::string& debug_name) const = 0;
+
+  virtual void SetState(scoped_refptr<State> state) = 0;
 };
 
 }  // namespace input_method