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

ash/wm/workspace/workspace_manager.h

Index: ash/wm/workspace/workspace_manager.h
diff --git a/ash/wm/workspace/workspace_manager.h b/ash/wm/workspace/workspace_manager.h
index dde10aaff4395891572d912d1a37e8b034ae8ffc..3bcff6a2610a5afbf88b077cf3e88869f0cc03da 100644
--- a/ash/wm/workspace/workspace_manager.h
+++ b/ash/wm/workspace/workspace_manager.h
@@ -64,6 +64,9 @@ class ASH_EXPORT WorkspaceManager : public aura::WindowObserver{
   // Sets the size of a single workspace (all workspaces have the same size).
   void SetWorkspaceSize(const gfx::Size& workspace_size);
 
+  // Called when screen work area insets changes.
+  void OnScreenWorkAreaInsetsChanged();
+
   // Returns the window the layout manager should allow the size to be set for.
   // TODO: maybe this should be set on WorkspaceLayoutManager.
   aura::Window* ignored_window() { return ignored_window_; }
@@ -139,6 +142,9 @@ class ASH_EXPORT WorkspaceManager : public aura::WindowObserver{
   // Reset the bounds of |window|. Use when |window| is fullscreen or maximized.
   void SetFullScreenOrMaximizedBounds(aura::Window* window);
 
+  // Sets the bounds of all workspaces.
+  void SetWorkspaceBounds();
+
   // Invoked when the type of workspace needed for |window| changes.
   void OnTypeOfWorkspacedNeededChanged(aura::Window* window);