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

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

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h"
 
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
@@ skipping 66 matching lines @@
   }
   return self;
 }
 
 - (void)updateColorsToMatchTheme {
   if (![[self window] inIncognitoMode]) {
     return;
   }
 
   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];
   if (inDarkMode) {
     // In MD Incognito the text is light gray against a dark background. When
     // selected, the light gray text against the selection color is illegible.
     // Rather than tweak or change the selection color, make the text black when
     // selected.
     [self setSelectedTextAttributes:@{
       NSForegroundColorAttributeName : [NSColor blackColor],
@@ skipping 508 matching lines @@
   if (!ui::MaterialDesignController::IsModeMaterial()) {
     return;
   }
   [self updateColorsToMatchTheme];
 }
 
 - (void)windowDidChangeActive {
 }
 
 @end