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

ash/wm/base_layout_manager.cc

 // Copyright (c) 2012 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 "ash/wm/base_layout_manager.h"
 
 #include "ash/shell.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 49 matching lines @@
     child_bounds = gfx::Screen::GetMonitorWorkAreaNearestWindow(child);
   else if (wm::IsWindowFullscreen(child))
     child_bounds = gfx::Screen::GetMonitorAreaNearestWindow(child);
   SetChildBoundsDirect(child, child_bounds);
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // BaseLayoutManager, RootWindowObserver overrides:
 
 void BaseLayoutManager::OnRootWindowResized(const gfx::Size& new_size) {
-  // 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.
-  for (WindowSet::const_iterator it = windows_.begin();
-       it != windows_.end();
-       ++it) {
-    aura::Window* window = *it;
-    // The work area may be smaller than the full screen.
-    gfx::Rect monitor_rect = wm::IsWindowFullscreen(window) ?
-        gfx::Screen::GetMonitorAreaNearestWindow(window) :
-        gfx::Screen::GetMonitorWorkAreaNearestWindow(window);
-    // Put as much of the window as possible within the monitor area.
-    window->SetBounds(window->bounds().AdjustToFit(monitor_rect));
-  }
+  AdjustWindowSizesForScreenChange();
+}
+
+void BaseLayoutManager::OnScreenWorkAreaInsetsChanged() {
+  AdjustWindowSizesForScreenChange();
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // BaseLayoutManager, WindowObserver overrides:
 
 void BaseLayoutManager::OnWindowPropertyChanged(aura::Window* window,
                                                 const void* key,
                                                 intptr_t old) {
   if (key == aura::client::kShowStateKey)
     UpdateBoundsFromShowState(window);
@@ skipping 22 matching lines @@
     case ui::SHOW_STATE_FULLSCREEN:
       SetRestoreBoundsIfNotSet(window);
       window->SetBounds(gfx::Screen::GetMonitorAreaNearestWindow(window));
       break;
 
     default:
       break;
   }
 }
 
+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 the work area insets changes.
+  for (WindowSet::const_iterator it = windows_.begin();
+       it != windows_.end();
+       ++it) {
+    aura::Window* window = *it;
+    // The work area may be smaller than the full screen.
+    gfx::Rect monitor_rect = wm::IsWindowFullscreen(window) ?
+        gfx::Screen::GetMonitorAreaNearestWindow(window) :
+        gfx::Screen::GetMonitorWorkAreaNearestWindow(window);
+    // Put as much of the window as possible within the monitor area.
+    window->SetBounds(window->bounds().AdjustToFit(monitor_rect));
+  }
+}
+
 }  // namespace internal
 }  // namespace ash