Fix Views inline autocomplete with multi-char graphemes.

ui/gfx/render_text_pango.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_RENDER_TEXT_PANGO_H_
 #define UI_GFX_RENDER_TEXT_PANGO_H_
 
 #include <pango/pango.h>
 #include <vector>
 
@@ skipping 18 matching lines @@
   virtual SelectionModel AdjacentCharSelectionModel(
       const SelectionModel& selection,
       VisualCursorDirection direction) OVERRIDE;
   virtual SelectionModel AdjacentWordSelectionModel(
       const SelectionModel& selection,
       VisualCursorDirection direction) OVERRIDE;
   virtual Range GetGlyphBounds(size_t index) OVERRIDE;
   virtual std::vector<Rect> GetSubstringBounds(const Range& range) OVERRIDE;
   virtual size_t TextIndexToLayoutIndex(size_t index) const OVERRIDE;
   virtual size_t LayoutIndexToTextIndex(size_t index) const OVERRIDE;
-  virtual bool IsCursorablePosition(size_t position) OVERRIDE;
+  virtual bool IsValidCursorIndex(size_t index) OVERRIDE;
   virtual void ResetLayout() OVERRIDE;
   virtual void EnsureLayout() OVERRIDE;
   virtual void DrawVisualText(Canvas* canvas) OVERRIDE;
 
  private:
   friend class RenderTextTest;
   FRIEND_TEST_ALL_PREFIXES(RenderTextTest, PangoAttributes);
 
   // Returns the run that contains the character attached to the caret in the
   // given selection model. Return NULL if not found.
@@ skipping 29 matching lines @@
 
   // The text in the |layout_|.
   const char* layout_text_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderTextPango);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_PANGO_H_