Fixes twice-IME-committement on blur.

ui/views/ime/input_method_bridge.cc

 // 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.
 
 #include "ui/views/ime/input_method_bridge.h"
 
 #include "ui/base/events/event.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/gfx/rect.h"
 #include "ui/views/view.h"
@@ skipping 27 matching lines @@
   if (shared_input_method_ || !host_->GetTextInputClient())
     host_->SetFocusedTextInputClient(this);
 
   // TODO(yusukes): We don't need to call OnTextInputTypeChanged() once we move
   // text input type tracker code to ui::InputMethodBase.
   if (GetFocusedView())
     OnTextInputTypeChanged(GetFocusedView());
 }
 
 void InputMethodBridge::OnBlur() {
-  ConfirmCompositionText();
+  if (HasCompositionText()) {
+    ConfirmCompositionText();
+    host_->CancelComposition(this);
+  }
 
   if (host_->GetTextInputClient() == this)
     host_->SetFocusedTextInputClient(NULL);
 }
 
 bool InputMethodBridge::OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                                  NativeEventResult* result) {
   return host_->OnUntranslatedIMEMessage(event, result);
 }
 
@@ skipping 182 matching lines @@
   OnTextInputTypeChanged(focused);
   OnCaretBoundsChanged(focused);
 }
 
 ui::InputMethod* InputMethodBridge::GetHostInputMethod() const {
   return host_;
 }
 
 
 }  // namespace views