[Mac] Touch Bar Support for Dialogs

ui/base/cocoa/touch_bar_util.mm

Index: ui/base/cocoa/touch_bar_util.mm
diff --git a/ui/base/cocoa/touch_bar_util.mm b/ui/base/cocoa/touch_bar_util.mm
new file mode 100644
index 0000000000000000000000000000000000000000..e4986f2a334473727576558364aa7f75bf65cee5
--- /dev/null
+++ b/ui/base/cocoa/touch_bar_util.mm
@@ -0,0 +1,42 @@
+// Copyright 2017 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 "ui/base/cocoa/touch_bar_util.h"
+
+#include "base/mac/foundation_util.h"
+#include "base/mac/sdk_forward_declarations.h"
+#include "base/strings/sys_string_conversions.h"
+
+namespace ui {
+
+Class NSTouchBar() {
+  return NSClassFromString(@"NSTouchBar");
+}
+
+Class NSCustomTouchBarItem() {
+  return NSClassFromString(@"NSCustomTouchBarItem");
+}
+
+NSButton* GetBlueTouchBarButton(NSString* title, id target, SEL action) {
+  NSButton* button =
+      [NSButton buttonWithTitle:title target:target action:action];
+  [button setBezelColor:[NSColor colorWithSRGBRed:0.168
+                                            green:0.51
+                                             blue:0.843
+                                            alpha:1.0]];
+  return button;
+}
+
+NSString* GetTouchBarId(NSString* touch_bar_id) {
+  NSString* chrome_bundle_id =
+      base::SysUTF8ToNSString(base::mac::BaseBundleID());
+  return [NSString stringWithFormat:@"%@.%@", chrome_bundle_id, touch_bar_id];
+}
+
+NSString* GetTouchBarItemId(NSString* touch_bar_id, NSString* item_id) {
+  return [NSString
+      stringWithFormat:@"%@-%@", GetTouchBarId(touch_bar_id), item_id];
+}
+
+}  // namespace ui