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

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
@@ skipping 528 matching lines @@
   [paragraph_style setLineBreakMode:NSLineBreakByTruncatingTail];
   [attributedString addAttribute:NSParagraphStyleAttributeName
                            value:paragraph_style
                            range:NSMakeRange(0, [attributedString length])];
 }
 
 void OmniboxViewMac::ApplyTextAttributes(
     const base::string16& display_text,
     NSMutableAttributedString* attributedString) {
   NSUInteger as_length = [attributedString length];
+  if (as_length == 0) {
+    return;
+  }
   NSRange as_entire_string = NSMakeRange(0, as_length);
   bool in_dark_mode = [[field_ window] inIncognitoModeWithSystemTheme];
 
   ApplyTextStyle(attributedString);
 
   // A kinda hacky way to add breaking at periods. This is what Safari does.
   // This works for IDNs too, despite the "en_US".
   [attributedString addAttribute:@"NSLanguage"
                            value:@"en_US_POSIX"
                            range:as_entire_string];
 
+  // Under Material Design, force the text to be a single color white editing.
+  if (ui::MaterialDesignController::IsModeMaterial() &&
+      [field_ currentEditor]) {
+    [attributedString addAttribute:NSForegroundColorAttributeName
+                             value:HostTextColor(in_dark_mode)
+                             range:as_entire_string];
+    return;
+  }
+
   url::Component scheme, host;
   AutocompleteInput::ParseForEmphasizeComponents(
       display_text, ChromeAutocompleteSchemeClassifier(profile_), &scheme,
       &host);
   bool grey_out_url = display_text.substr(scheme.begin, scheme.len) ==
       base::UTF8ToUTF16(extensions::kExtensionScheme);
   if (model()->CurrentTextIsURL() &&
       (host.is_nonempty() || grey_out_url)) {
     [attributedString addAttribute:NSForegroundColorAttributeName
                              value:BaseTextColor(in_dark_mode)
@@ skipping 551 matching lines @@
 
 NSUInteger OmniboxViewMac::GetTextLength() const {
   return [field_ currentEditor] ?  [[[field_ currentEditor] string] length] :
                                    [[field_ stringValue] length];
 }
 
 bool OmniboxViewMac::IsCaretAtEnd() const {
   const NSRange selection = GetSelectedRange();
   return NSMaxRange(selection) == GetTextLength();
 }