Introduce new WebApp header style for hosted apps and fizzy apps on ash.

ash/frame/default_header_painter.cc

Index: ash/frame/default_header_painter.cc
diff --git a/ash/frame/default_header_painter.cc b/ash/frame/default_header_painter.cc
index fd31d776e91913c78bc0c304370793280d4db70e..6b6553ffdfa315cc0202571c4bfad11ed9c8d349 100644
--- a/ash/frame/default_header_painter.cc
+++ b/ash/frame/default_header_painter.cc
@@ -319,7 +319,11 @@ gfx::Rect DefaultHeaderPainter::GetLocalBounds() const {
 
 gfx::Rect DefaultHeaderPainter::GetTitleBounds() const {
   return HeaderPainterUtil::GetTitleBounds(
-      window_icon_, caption_button_container_, GetTitleFontList());
+      GetViewToLeftOfTitle(), caption_button_container_, GetTitleFontList());
+}
+
+views::View* DefaultHeaderPainter::GetViewToLeftOfTitle() const {
+  return window_icon_;
 }
 
 gfx::ImageSkia* DefaultHeaderPainter::GetActiveFrameImage() const {