[Editing][CodeHealth] Extract new FrameCaret class from FrameSelection

third_party/WebKit/Source/core/editing/FrameCaret.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.

[yosin_UTC9, 2016/05/19 08:32:36]

Copyright text should be taken from FrameSelection.cpp
Since these codes are moved with some changes from FrameSelection.cpp

[yoichio, 2016/05/20 05:12:12]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/editing/FrameCaret.h"
+
+namespace blink {
+
+FrameCaret::FrameCaret(LocalFrame* frame)
+    : m_frame(frame)
+    , m_previousCaretVisibility(CaretVisibility::Hidden)
+    , m_caretBlinkTimer(this, &FrameCaret::caretBlinkTimerFired)
+    , m_caretRectDirty(true)
+    , m_shouldPaintCaret(true)
+    , m_isCaretBlinkingSuspended(false)
+{
+    DCHECK(frame);
+}
+
+DEFINE_TRACE(FrameCaret)
+{
+    visitor->trace(m_frame);
+    visitor->trace(m_previousCaretNode);
+    CaretBase::trace(visitor);
+}
+
+} // nemaspace blink