[WIP] Add support for Android SuggestionSpans when editing text

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index f85af22c6efbe3bb745c65a8f18475f3e880ff1b..722765a39b2788af1bc7eb49e6ec38173cb99ed0 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -268,6 +268,7 @@ class CONTENT_EXPORT RenderWidget
   void SetInputHandler(RenderWidgetInputHandler* input_handler) override;
   void ShowVirtualKeyboard() override;
   void UpdateTextInputState() override;
+  void HandlePotentialTextSuggestionTap() override;
   bool WillHandleGestureEvent(const blink::WebGestureEvent& event) override;
   bool WillHandleMouseEvent(const blink::WebMouseEvent& event) override;
 
@@ -506,6 +507,10 @@ class CONTENT_EXPORT RenderWidget
       const gfx::Range& replacement_range,
       int relative_cursor_pos);
   virtual void OnImeFinishComposingText(bool keep_selection);
+  virtual void OnImeApplySuggestionReplacement(int document_marker_id,
+                                               int suggestion_index);
+  virtual void OnImeDeleteSuggestionHighlight();
+  virtual void OnImeCloseSuggestionMenu();
 
   // Called when the device scale factor is changed, or the layer tree is
   // initialized.