Show avatar icon on V2 app's frame

ash/frame/header_painter.h

Index: ash/frame/header_painter.h
diff --git a/ash/frame/header_painter.h b/ash/frame/header_painter.h
index 520758310d50c8b7b6a68342521dbedaaae0e5cd..130fc4d87dffe37848e89079f2653257a98b4c51 100644
--- a/ash/frame/header_painter.h
+++ b/ash/frame/header_painter.h
@@ -56,6 +56,10 @@ class ASH_EXPORT HeaderPainter : public gfx::AnimationDelegate {
             views::View* window_icon,
             FrameCaptionButtonContainerView* caption_button_container);
 
+  // Sets the window icon to the header. Passing NULL removes the window icon.
+  void UpdateWindowIcon(views::View* window_icon,
+                        const gfx::Size& window_icon_size);

[pkotwicz, 2014/03/18 04:41:15]

Can you please merge with https://codereview.chromium.org/189463013/ now that it
has landed.

Nits:
- I think that having a different method to set and clear the icon makes more
sense.
- window icon to the header -> window icon for the header

[oshima, 2014/03/18 14:57:03]

done
Nah, I think it's overkill as setting NULL to reset is pretty common.
done

+
   // Returns the bounds of the client view for a window with |header_height|
   // and |window_bounds|. The return value and |window_bounds| are in the
   // views::NonClientView's coordinates.
@@ -160,6 +164,7 @@ class ASH_EXPORT HeaderPainter : public gfx::AnimationDelegate {
   views::Widget* frame_;
   views::View* header_view_;
   views::View* window_icon_;  // May be NULL.
+  gfx::Size window_icon_size_;
   FrameCaptionButtonContainerView* caption_button_container_;
 
   // The height of the header.