Fix compile with Aura/Mac ash_shell and workspace controller

ui/aura/root_window.cc

Index: ui/aura/root_window.cc
diff --git a/ui/aura/root_window.cc b/ui/aura/root_window.cc
index 2d66c34e052d381ecc72f19a06cd5ef34f2a9650..19bce7a6e74b8b7af5febe7e13f5a57f010a42ba 100644
--- a/ui/aura/root_window.cc
+++ b/ui/aura/root_window.cc
@@ -482,8 +482,9 @@ bool RootWindow::ProcessMouseEvent(Window* target, MouseEvent* event) {
 
   EventFilters filters;
   GetEventFiltersToNotify(target->parent(), &filters);
-  for (EventFilters::const_reverse_iterator it = filters.rbegin();
-       it != filters.rend(); ++it) {
+  for (EventFilters::const_reverse_iterator it = filters.rbegin(),
+           rend = filters.rend();
+       it != rend; ++it) {
     if ((*it)->PreHandleMouseEvent(target, event))
       return true;
   }
@@ -505,8 +506,9 @@ bool RootWindow::ProcessKeyEvent(Window* target, KeyEvent* event) {
     GetEventFiltersToNotify(target->parent(), &filters);
   }
 
-  for (EventFilters::const_reverse_iterator it = filters.rbegin();
-       it != filters.rend(); ++it) {
+  for (EventFilters::const_reverse_iterator it = filters.rbegin(),
+           rend = filters.rend();
+       it != rend; ++it) {
     if ((*it)->PreHandleKeyEvent(target, event))
       return true;
   }
@@ -523,8 +525,9 @@ ui::TouchStatus RootWindow::ProcessTouchEvent(Window* target,
 
   EventFilters filters;
   GetEventFiltersToNotify(target->parent(), &filters);
-  for (EventFilters::const_reverse_iterator it = filters.rbegin();
-       it != filters.rend(); ++it) {
+  for (EventFilters::const_reverse_iterator it = filters.rbegin(),
+           rend = filters.rend();
+       it != rend; ++it) {
     ui::TouchStatus status = (*it)->PreHandleTouchEvent(target, event);
     if (status != ui::TOUCH_STATUS_UNKNOWN)
       return status;
@@ -541,8 +544,9 @@ ui::GestureStatus RootWindow::ProcessGestureEvent(Window* target,
   EventFilters filters;
   GetEventFiltersToNotify(target->parent(), &filters);
   ui::GestureStatus status = ui::GESTURE_STATUS_UNKNOWN;
-  for (EventFilters::const_reverse_iterator it = filters.rbegin();
-       it != filters.rend(); ++it) {
+  for (EventFilters::const_reverse_iterator it = filters.rbegin(),
+           rend = filters.rend();
+       it != rend; ++it) {
     status = (*it)->PreHandleGestureEvent(target, event);
     if (status != ui::GESTURE_STATUS_UNKNOWN)
       return status;