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

ui/gfx/decorated_text.h

Index: ui/gfx/decorated_text.h
diff --git a/ui/gfx/decorated_text.h b/ui/gfx/decorated_text.h
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+// Copyright 2016 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_DECORATED_TEXT_H_
+#define UI_GFX_DECORATED_TEXT_H_
+
+#include <vector>
+
+#include "base/strings/string16.h"
+#include "ui/gfx/font.h"
+#include "ui/gfx/gfx_export.h"
+#include "ui/gfx/range/range.h"
+
+namespace gfx {
+
+// Encapsulates styling information for some given text.
+struct GFX_EXPORT DecoratedText {
+  // Describes the various text decoration attributes applicable to a given
+  // range of text.
+  struct GFX_EXPORT RangedAttribute {
+    // Disallow default construction of Font, since that's slow.
+    RangedAttribute() = delete;
+    RangedAttribute(const Range& range, const Font& font);
+
+    // The range in |text|, this RangedAttribute corresponds to. Should not be
+    // reversed and should lie within the bounds of |text|.
+    Range range;
+    Font font;
+    bool strike;
+    bool diagonal_strike;
+  };
+
+  DecoratedText();
+  ~DecoratedText();
+
+  base::string16 text;
+
+  // Vector of RangedAttribute describing styling of non-overlapping ranges
+  // in |text|.
+  std::vector<RangedAttribute> attributes;
+};
+
+};  // namespace gfx
+
+#endif  // UI_GFX_DECORATED_TEXT_H_