Add text offset to OnSurroundingTextChanged

ui/views/controls/prefix_selector.h

 // Copyright 2013 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_VIEWS_CONTROLS_PREFIX_SELECTOR_H_
 #define UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_
 
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "ui/base/ime/text_input_client.h"
@@ skipping 24 matching lines @@
   int GetTextInputFlags() const override;
   bool CanComposeInline() const override;
   gfx::Rect GetCaretBounds() const override;
   bool GetCompositionCharacterBounds(uint32 index,
                                      gfx::Rect* rect) const override;
   bool HasCompositionText() const override;
   bool GetTextRange(gfx::Range* range) const override;
   bool GetCompositionTextRange(gfx::Range* range) const override;
   bool GetSelectionRange(gfx::Range* range) const override;
   bool SetSelectionRange(const gfx::Range& range) override;
+  uint32 GetSelectionOffset() const override;
   bool DeleteRange(const gfx::Range& range) override;
   bool GetTextFromRange(const gfx::Range& range,
                         base::string16* text) const override;
   void OnInputMethodChanged() override;
   bool ChangeTextDirectionAndLayoutAlignment(
       base::i18n::TextDirection direction) override;
   void ExtendSelectionAndDelete(size_t before, size_t after) override;
   void EnsureCaretInRect(const gfx::Rect& rect) override;
 
   bool IsEditCommandEnabled(int command_id) override;
@@ skipping 15 matching lines @@
   base::TimeTicks time_of_last_key_;
 
   base::string16 current_text_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefixSelector);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_PREFIX_SELECTOR_H_