Attempt 3: Makes managed mode constrain the height of windows so they don't

ash/wm/toplevel_window_event_filter.cc

Index: ash/wm/toplevel_window_event_filter.cc
diff --git a/ash/wm/toplevel_window_event_filter.cc b/ash/wm/toplevel_window_event_filter.cc
index 20ae5e5ed135d994165b976d309d05c55ca3f498..78645fefc7b98f769c6a14ea3a656692d0357c41 100644
--- a/ash/wm/toplevel_window_event_filter.cc
+++ b/ash/wm/toplevel_window_event_filter.cc
@@ -48,8 +48,7 @@ bool ToplevelWindowEventFilter::PreHandleMouseEvent(aura::Window* target,
           target->delegate()->GetNonClientComponent(event->location());
       if (WindowResizer::GetBoundsChangeForWindowComponent(component)) {
         window_resizer_.reset(
-            new WindowResizer(target, event->location(), component,
-                              grid_size_));
+            CreateWindowResizer(target, event->location(), component));
         if (!window_resizer_->is_resizable())
           window_resizer_.reset();
       } else {
@@ -93,7 +92,7 @@ ui::GestureStatus ToplevelWindowEventFilter::PreHandleGestureEvent(
       }
       in_gesture_resize_ = true;
       window_resizer_.reset(
-          new WindowResizer(target, event->location(), component, grid_size_));
+          CreateWindowResizer(target, event->location(), component));
       if (!window_resizer_->is_resizable())
         window_resizer_.reset();
       break;
@@ -125,7 +124,7 @@ void ToplevelWindowEventFilter::RunMoveLoop(aura::Window* source) {
   aura::Window::ConvertPointToWindow(
       Shell::GetRootWindow(), source, &source_mouse_location);
   window_resizer_.reset(
-      new WindowResizer(source, source_mouse_location, HTCAPTION, grid_size_));
+      CreateWindowResizer(source, source_mouse_location, HTCAPTION));
 #if !defined(OS_MACOSX)
   MessageLoopForUI::current()->RunWithDispatcher(
       aura::Env::GetInstance()->GetDispatcher());
@@ -143,6 +142,13 @@ void ToplevelWindowEventFilter::EndMoveLoop() {
   Shell::GetRootWindow()->PostNativeEvent(ui::CreateNoopEvent());
 }
 
+WindowResizer* ToplevelWindowEventFilter::CreateWindowResizer(
+    aura::Window* window,
+    const gfx::Point& point,
+    int window_component) {
+  return new WindowResizer(window, point, window_component, grid_size_);
+}
+
 void ToplevelWindowEventFilter::CompleteDrag(aura::Window* window) {
   scoped_ptr<WindowResizer> resizer(window_resizer_.release());
   if (resizer.get())