PageInfo bubble: Use the non-client view's window title and close button.

ui/views/bubble/bubble_dialog_delegate.h

Index: ui/views/bubble/bubble_dialog_delegate.h
diff --git a/ui/views/bubble/bubble_dialog_delegate.h b/ui/views/bubble/bubble_dialog_delegate.h
index 4f791cd735813a91207cf60c9c9f32f86e41688e..888da484391257ec13c7b1317ecd75c0d61587e3 100644
--- a/ui/views/bubble/bubble_dialog_delegate.h
+++ b/ui/views/bubble/bubble_dialog_delegate.h
@@ -79,6 +79,10 @@ class VIEWS_EXPORT BubbleDialogDelegateView : public DialogDelegateView,
 
   const gfx::Insets& margins() const { return margins_; }
   void set_margins(const gfx::Insets& margins) { margins_ = margins; }
+  const gfx::Insets& title_margins() const { return title_margins_; }
+  void set_title_margins(const gfx::Insets& title_margins) {

[msw, 2017/01/05 01:00:00]

Bummer, it seems like we need this mostly so the website settings bubble can
left-align its title with the rest of its content. It'd be nice to avoid custom
title margins and instead use the standard title/panel margins for the content
(ie. make the content's left-margin match the title's left-margin, instead of
the inverse). It's a difference of 3px on top and left, afaict:
kPanelHorizMargin==13 vs kSectionPaddingHorizontal==16, and kPanelVertMargin==13
vs kHeaderPaddingTop==16. wdyt?

[tapted, 2017/01/05 02:20:42]

Done. Added a screenshot at http://crbug.com/674269#c7

+    title_margins_ = title_margins;
+  }
 
   const gfx::Insets& anchor_view_insets() const { return anchor_view_insets_; }
   void set_anchor_view_insets(const gfx::Insets& i) { anchor_view_insets_ = i; }
@@ -190,6 +194,7 @@ class VIEWS_EXPORT BubbleDialogDelegateView : public DialogDelegateView,
 
   // The margins between the content and the inside of the border.
   gfx::Insets margins_;
+  gfx::Insets title_margins_;
 
   // Insets applied to the |anchor_view_| bounds.
   gfx::Insets anchor_view_insets_;