Fix the full screen switching browser window dipping below launcher bar issue.

ash/wm/base_layout_manager.cc

Index: ash/wm/base_layout_manager.cc
diff --git a/ash/wm/base_layout_manager.cc b/ash/wm/base_layout_manager.cc
index d79922da3ca3e3af4b5a24228e281f0a8b46d304..2ff9b14c6f7940a1fc39975f32b5e49ea94f3c14 100644
--- a/ash/wm/base_layout_manager.cc
+++ b/ash/wm/base_layout_manager.cc
@@ -67,10 +67,20 @@ void BaseLayoutManager::SetChildBounds(aura::Window* child,
 // BaseLayoutManager, RootWindowObserver overrides:
 
 void BaseLayoutManager::OnRootWindowResized(const gfx::Size& new_size) {
+  AdjustWindowSizesForScreenChange();
+}
+
+void BaseLayoutManager::OnScreenWorkAreaInsetsChanged() {
+  AdjustWindowSizesForScreenChange();
+}
+
+void BaseLayoutManager::AdjustWindowSizesForScreenChange() {
   // If a user plugs an external monitor into a laptop running Aura the
   // monitor size will change.  Maximized windows need to resize to match.
   // We also do this when developers running Aura on a desktop manually resize
   // the host window.
+  // We also need to do this when user toggles between full screen mode and
+  // normal mode with maximized windows.
   for (WindowSet::const_iterator it = windows_.begin();
        it != windows_.end();
        ++it) {