Revert of [Mac][Material Design] Rework how location bar shadow is drawn.

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

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
index 8bc360f23b1a613f941f42a9394e0249cdb8c29a..1c09fd58e70fc0caf75bbdbd796d12169ee8b2f9 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
@@ -141,15 +141,9 @@
 
   base::scoped_nsobject<NSString> suggestText_;
   base::scoped_nsobject<NSColor> suggestColor_;
-
-  base::scoped_nsobject<NSView> shadowView_;
 }
 
 @property(nonatomic) AutocompleteTextFieldObserver* observer;
-
-// Returns the color of the shadow that's drawn under the AutocompleteTextField
-// in Incognito mode in Material Design.
-+ (NSColor*)shadowColor;
 
 // Convenience method to return the cell, casted appropriately.
 - (AutocompleteTextFieldCell*)cell;