views: implement width snapping for DialogDelegateViews

chrome/browser/ui/views/harmony/layout_delegate.h

Index: chrome/browser/ui/views/harmony/layout_delegate.h
diff --git a/chrome/browser/ui/views/harmony/layout_delegate.h b/chrome/browser/ui/views/harmony/layout_delegate.h
index 9cfbd5659a2798a016e726b401fa9957e3fece30..e4dc4f1ba4d4d9b48ac866d2e84dbf7f7c73b73f 100644
--- a/chrome/browser/ui/views/harmony/layout_delegate.h
+++ b/chrome/browser/ui/views/harmony/layout_delegate.h
@@ -104,9 +104,8 @@ class LayoutDelegate {
   // TODO(pkasting): Fix callers and remove this.
   virtual bool IsHarmonyMode() const;
 
-  // Returns the preferred width in DIPs for a dialog of the specified |width|.
-  // May return 0 if the dialog has no preferred width.
-  virtual int GetDialogPreferredWidth(DialogWidth width) const;
+  // Returns the smallest allowable width for a dialog |width| points wide.

[Peter Kasting, 2017/03/30 00:35:35]

Nit: "...for a dialog that wants a width of at least |width|."

+  virtual int GetSnappedDialogWidth(int width) const;
 
   // Returns the class that maps views::style values (TextContext and TextStyle)
   // to specific font properties (e.g. typeface, size, color, line spacing).