Add common data types for input method support.

ui/base/ime/composition_underline.h

+// Copyright (c) 2011 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_BASE_IME_COMPOSITION_UNDERLINE_H_
+#define UI_BASE_IME_COMPOSITION_UNDERLINE_H_
+#pragma once
+
+#include <vector>
+
+#include "third_party/skia/include/core/SkColor.h"
+
+namespace ui {
+
+// Intentionally keep sync with WebKit::WebCompositionUnderline defined in:
+// third_party/WebKit/Source/WebKit/chromium/public/WebCompositionUnderline.h
+struct CompositionUnderline {
+  CompositionUnderline()
+    : start_offset(0),
+      end_offset(0),
+      color(0),
+      thick(false) {}
+
+  CompositionUnderline(unsigned s, unsigned e, SkColor c, bool t)
+    : start_offset(s),
+      end_offset(e),
+      color(c),
+      thick(t) {}
+
+  unsigned start_offset;
+  unsigned end_offset;

[oshima, 2011/03/18 19:03:25]

use of unsigned is discouraged. I'm guess this is because WebKit uses it, so
please mention in the comment.

[James Su, 2011/03/18 19:18:35]

Done.

+  SkColor color;
+  bool thick;
+};
+
+typedef std::vector<CompositionUnderline> CompositionUnderlines;
+
+}  // namespace ui
+
+#endif  // UI_BASE_IME_COMPOSITION_UNDERLINE_H_