Convert location bar decorations to Material Design (Mac).

chrome/browser/ui/cocoa/location_bar/ev_bubble_decoration.h

Index: chrome/browser/ui/cocoa/location_bar/ev_bubble_decoration.h
diff --git a/chrome/browser/ui/cocoa/location_bar/ev_bubble_decoration.h b/chrome/browser/ui/cocoa/location_bar/ev_bubble_decoration.h
index ce43dbe25e0791dfdb49f896918a7ad08d3d0ac1..a69c72fdcf0103b1e1cf403d02a37c715bb59dad 100644
--- a/chrome/browser/ui/cocoa/location_bar/ev_bubble_decoration.h
+++ b/chrome/browser/ui/cocoa/location_bar/ev_bubble_decoration.h
@@ -26,6 +26,9 @@ class EVBubbleDecoration : public BubbleDecoration {
   explicit EVBubbleDecoration(LocationIconDecoration* location_icon);
   ~EVBubbleDecoration() override;
 
+  // Return the color used to draw the EvBubbleDecoration background in MD.
+  NSColor* GetBackgroundBorderColor() override;
+
   // |GetWidthForSpace()| will set |full_label| as the label, if it
   // fits, else it will set an elided version.
   void SetFullLabel(NSString* full_label);