Implement GetTextFromRange(), GetTextRange() and GetSelectionRange() for ArcImeService.

components/arc/ime/arc_ime_bridge_impl.h

Index: components/arc/ime/arc_ime_bridge_impl.h
diff --git a/components/arc/ime/arc_ime_bridge_impl.h b/components/arc/ime/arc_ime_bridge_impl.h
index 548a8dacf09ccda4932d58f90ec7769cb8eea373..46faa043070886faf605a80bcf9f375a02b23131 100644
--- a/components/arc/ime/arc_ime_bridge_impl.h
+++ b/components/arc/ime/arc_ime_bridge_impl.h
@@ -46,6 +46,11 @@ class ArcImeBridgeImpl : public ArcImeBridge,
   void OnCursorRectChanged(mojom::CursorRectPtr rect) override;
   void OnCancelComposition() override;
   void ShowImeIfNeeded() override;
+  void OnCursorRectChangedWithSurroundingText(
+      mojom::CursorRectPtr rect,
+      mojom::TextRangePtr text_range,
+      const std::string& text_in_range,
+      mojom::TextRangePtr selection_range) override;
 
  private:
   mojo::Binding<mojom::ImeHost> binding_;