[Cleanup] Remove the useless comment in LayoutTextFragment

The 'FIXME' in LayoutTextFragment.h comment by eae@ is done, remove it.

BUG=
R=eae@chromium.org
Signed-off-by: zhuoyu.qian <zhuoyu.qian@samsung.com>
Change-Id: I8c93bd1c3785c31086b403cbc951ee8a67a5fb5e
Reviewed-on: https://chromium-review.googlesource.com/737403Reviewed-by: Emil A Eklund <eae@chromium.org>
Commit-Queue: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512540}

third_party/WebKit/Source/core/layout/LayoutTextFragment.h

@@ -80,7 +80,6 @@ class CORE_EXPORT LayoutTextFragment final : public LayoutText {
 
   void TransformText() override;
 
-  // FIXME: Rename to LayoutTextFragment
   const char* GetName() const override { return "LayoutTextFragment"; }
 
   void SetFirstLetterPseudoElement(FirstLetterPseudoElement* element) {