Track text selection on the browser side (Mac)

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index 5bc917888e5766a6a63a2459e759934d8a036252..8482d5aae157f918e9ab484c95987f111416d241 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -84,7 +84,15 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
     return current_device_scale_factor_;
   }
 
+  // Returns the view which is inside |view| and is currently focused (i.e.,
+  // accepts input events). It might return nullptr if |view| does not have a
+  // RenderWidgetHost or the focused widget returned by RenderWidgetHostDelegate
+  // for the |view|'s RWH is nullptr.
+  static RenderWidgetHostViewBase* GetFocusedSubView(
+      RenderWidgetHostViewBase* view);
+
   // RenderWidgetHostView implementation.
+  RenderWidgetHost* GetRenderWidgetHost() const override;
   void SetBackgroundColor(SkColor color) override;
   void SetBackgroundColorToDefault() final;
   bool GetBackgroundOpaque() override;
@@ -411,6 +419,10 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // |text_input_manager_|.
   TextInputManager* GetTextInputManager();
 
+  // Returns the the view which has a RWH and is currently accepting input
+  // events (focused).
+  RenderWidgetHostViewBase* GetFocusedAttachedSubView() const;
+
   // Whether this view is a popup and what kind of popup it is (select,
   // autofill...).
   blink::WebPopupType popup_type_;