[MacViews] Frameless app windows: make content view cover title bar.

chrome/browser/ui/views/apps/app_window_native_widget_mac.h

Index: chrome/browser/ui/views/apps/app_window_native_widget_mac.h
diff --git a/chrome/browser/ui/views/apps/app_window_native_widget_mac.h b/chrome/browser/ui/views/apps/app_window_native_widget_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..ae7cfc2c4eb5d8833abddace515c30a976dac671
--- /dev/null
+++ b/chrome/browser/ui/views/apps/app_window_native_widget_mac.h
@@ -0,0 +1,26 @@
+// Copyright 2015 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_APPS_APP_WINDOW_NATIVE_WIDGET_MAC_H
+#define CHROME_BROWSER_UI_VIEWS_APPS_APP_WINDOW_NATIVE_WIDGET_MAC_H
+
+#include "ui/views/widget/native_widget_mac.h"
+
+// This implements features specific to app windows, e.g. frameless windows that
+// behave like normal windows.
+class AppWindowNativeWidgetMac : public views::NativeWidgetMac {
+ public:
+  explicit AppWindowNativeWidgetMac(views::Widget* widget);
+  ~AppWindowNativeWidgetMac() override;
+
+ protected:
+  // NativeWidgetMac:
+  gfx::NativeWindow CreateNSWindow(
+      const views::Widget::InitParams& params) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AppWindowNativeWidgetMac);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_APPS_APP_WINDOW_NATIVE_WIDGET_MAC_H