Fix a compile error caused in some compiler.

athena/home/home_card_impl.cc

 // Copyright 2014 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 "athena/home/public/home_card.h"
 
 #include <limits>
 
 #include "athena/home/app_list_view_delegate.h"
 #include "athena/home/bottom_home_view.h"
@@ skipping 181 matching lines @@
 
     switch (state_) {
       case VISIBLE_CENTERED:
         // Span the screen fully.
         return std::numeric_limits<int>::max();
       case VISIBLE_BOTTOM:
         return kHomeCardHeight;
       case VISIBLE_MINIMIZED:
         return kHomeCardMinimizedHeight;
       case HIDDEN:
-        NOTREACHED();
-        return -1;
+        break;
     }
+    NOTREACHED();
+    return -1;
   }
 
   virtual int GetHorizontalMargin() const OVERRIDE {
     CHECK_NE(HIDDEN, state_);
     const int kHomeCardHorizontalMargin = 50;
     return state_ == VISIBLE_BOTTOM ? kHomeCardHorizontalMargin : 0;
   }
 
   virtual aura::Window* GetNativeWindow() OVERRIDE {
     if (state_ == HIDDEN)
@@ skipping 141 matching lines @@
   instance = NULL;
 }
 
 // static
 HomeCard* HomeCard::Get() {
   DCHECK(instance);
   return instance;
 }
 
 }  // namespace athena