MacViews: Implement Force Touch/Mac dictionary lookup for Textfields.

ui/gfx/native_widget_types.h

 // 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.
 
 #ifndef UI_GFX_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
 
 #include <stdint.h>
 
 #include "base/logging.h"
+#include "base/strings/string16.h"
 #include "build/build_config.h"
 
 #if defined(OS_ANDROID)
 #include <jni.h>
 #endif
 
 // This file provides cross platform typedefs for native widget types.
 //   NativeWindow: this is a handle to a native, top-level window
 //   NativeView: this is a handle to a native UI element. It may be the
 //     same type as a NativeWindow on some platforms.
@@ skipping 52 matching lines @@
 #elif defined(OS_MACOSX)
 struct CGContext;
 #ifdef __OBJC__
 @class NSCursor;
 @class NSEvent;
 @class NSFont;
 @class NSImage;
 @class NSView;
 @class NSWindow;
 @class NSTextField;
+@class NSMutableAttributedString;
 #else
 class NSCursor;
 class NSEvent;
 class NSFont;
 class NSImage;
 struct NSView;
 class NSWindow;
 class NSTextField;
+class NSMutableAttributedString;
 #endif  // __OBJC__
 #elif defined(OS_POSIX)
 typedef struct _cairo cairo_t;
 #endif
 
 #if defined(OS_ANDROID)
 struct ANativeWindow;
 namespace ui {
 class WindowAndroid;
 class ViewAndroid;
@@ skipping 107 matching lines @@
 #elif defined(OS_ANDROID)
 typedef ANativeWindow* AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = 0;
 #elif defined(USE_OZONE)
 typedef int32_t AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = 0;
 #else
 #error unknown platform
 #endif
 
+#if defined(OS_MACOSX)
+typedef NSMutableAttributedString* NativeStyledString;
+#else
+typedef base::string16* NativeStyledString;
+#endif
+
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_WIDGET_TYPES_H_