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

ash/wm/panels/panel_frame_view.cc

Index: ash/wm/panels/panel_frame_view.cc
diff --git a/ash/wm/panels/panel_frame_view.cc b/ash/wm/panels/panel_frame_view.cc
index 24e37b5fa239f6bb134dfd73e57028a18d6fe77f..a62fe163ddd698fed8e0d72970b0e149555b3a3e 100644
--- a/ash/wm/panels/panel_frame_view.cc
+++ b/ash/wm/panels/panel_frame_view.cc
@@ -43,12 +43,13 @@ void PanelFrameView::InitHeaderPainter() {
       FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
   AddChildView(caption_button_container_);
 
+  header_painter_->Init(frame_, this, caption_button_container_);
+
   if (frame_->widget_delegate()->ShouldShowWindowIcon()) {
     window_icon_ = new views::ImageView();
     AddChildView(window_icon_);
+    header_painter_->UpdateLeftHeaderView(window_icon_);
   }
-
-  header_painter_->Init(frame_, this, window_icon_, caption_button_container_);
 }
 
 int PanelFrameView::NonClientTopBorderHeight() const {