[Mac][Material Design] Correct location bar editing text colors.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
index 8a7128fed4f8e6b62dd7b08d0c1332e514305705..f76f2a3cb87f523be1f48f6904b3c29cf7cdfd52 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
@@ -84,10 +84,9 @@ BOOL ThePasteboardIsTooDamnBig() {
   }
 
   bool inDarkMode = [[self window] inIncognitoModeWithSystemTheme];
-  // Draw a light insertion point for MD Incognito.
+  // Draw a white insertion point for MD Incognito.
   NSColor* insertionPointColor =
-      inDarkMode ? [NSColor colorWithCalibratedWhite:1 alpha:0.75]
-                 : [NSColor blackColor];
+      inDarkMode ? [NSColor whiteColor] : [NSColor blackColor];
   [self setInsertionPointColor:insertionPointColor];
 
   NSColor* textSelectionColor = [NSColor selectedTextBackgroundColor];