Fix "unreachable code" warnings (MSVC warning 4702) in ui/.

ui/views/event_utils_aura.cc

 // Copyright 2013 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/event_utils.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/window_event_dispatcher.h"
@@ skipping 16 matching lines @@
     target_window = ::WindowFromPoint(event.location().ToPOINT());
     if (::GetWindowThreadProcessId(target_window, NULL) !=
         ::GetCurrentThreadId())
       return false;
   } else {
     if (ViewsDelegate::views_delegate &&
         !ViewsDelegate::views_delegate->IsWindowInMetro(window))
       target_window = window->GetHost()->GetAcceleratedWidget();
   }
   return RepostLocatedEventWin(target_window, event);
-#endif
+#else
   if (!window)
     return false;
 
   aura::Window* root_window = window->GetRootWindow();
 
   gfx::Point root_loc(event.location());
   ScreenPositionClient* spc =
       aura::client::GetScreenPositionClient(root_window);
   if (!spc)
     return false;
 
   spc->ConvertPointFromScreen(root_window, &root_loc);
 
   scoped_ptr<ui::LocatedEvent> relocated;
-  if (event.IsMouseEvent()) {
-    const ui::MouseEvent& orig = static_cast<const ui::MouseEvent&>(event);
-    relocated.reset(new ui::MouseEvent(orig));
-  } else if (event.IsGestureEvent()) {
+  if (!event.IsMouseEvent()) {
     // TODO(rbyers): Gesture event repost is tricky to get right
     // crbug.com/170987.
-    return false;
-  } else {
-    NOTREACHED();
+    DCHECK(event.IsGestureEvent());
     return false;
   }
+
+  const ui::MouseEvent& orig = static_cast<const ui::MouseEvent&>(event);
+  relocated.reset(new ui::MouseEvent(orig));
   relocated->set_location(root_loc);
   relocated->set_root_location(root_loc);
 
   root_window->GetHost()->dispatcher()->RepostEvent(*relocated);
   return true;
+#endif
 }
 
 }  // namespace views