Handle titlebar text updates properly

ash/wm/frame_painter.h

Index: ash/wm/frame_painter.h
diff --git a/ash/wm/frame_painter.h b/ash/wm/frame_painter.h
index 852becb8f1ff86c26cfeb953ead331adffc80566..dd213aa616c3a41e8c61610daa17bdc599d3ed10 100644
--- a/ash/wm/frame_painter.h
+++ b/ash/wm/frame_painter.h
@@ -112,6 +112,10 @@ class ASH_EXPORT FramePainter : public aura::WindowObserver,
   // not always.
   void LayoutHeader(views::NonClientFrameView* view, bool shorter_layout);
 
+  // Schedule a re-paint of the entire title.
+  void SchedulePaintForTitle(views::NonClientFrameView* view,
+                             const gfx::Font& title_font);
+
   // aura::WindowObserver overrides:
   virtual void OnWindowPropertyChanged(aura::Window* window,
                                        const void* key,
@@ -162,6 +166,11 @@ class ASH_EXPORT FramePainter : public aura::WindowObserver,
   // a header (or other way around).
   void SchedulePaintForHeader();
 
+  // Get the bounds for the title. The provided |view| and |title_font| are
+  // used to determine the correct dimensions.
+  gfx::Rect GetTitleBounds(views::NonClientFrameView* view,
+                           const gfx::Font& title_font);
+
   static std::set<FramePainter*>* instances_;
 
   // Not owned