Implement TouchSelectionEditing controls for OOPIF.

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 6bb3159a0dd1937ba1f31c4d35b05847208b11e6..c8ae2717be17d6074d922caf17205b63d67cf0c7 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -75,6 +75,7 @@ class RenderWidgetHostImpl;
 class RenderWidgetHostViewBaseObserver;
 class SyntheticGestureTarget;
 class TextInputManager;
+class TouchSelectionControllerClientManager;
 class WebCursor;
 struct NativeWebKeyboardEvent;
 struct TextInputState;
@@ -416,6 +417,9 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
 
   bool is_fullscreen() { return is_fullscreen_; }
 
+  virtual TouchSelectionControllerClientManager*

[kenrb, 2017/05/23 16:19:03]

A comment could be good here, mentioning that this only returns non-null on
platforms that implement touch selection, currently Aura and Android.

[wjmaclean, 2017/05/23 17:00:41]

Done.

+  touch_selection_controller_client_manager();
+
   // Exposed for testing.
   virtual bool IsChildFrameForTesting() const;
   virtual cc::SurfaceId SurfaceIdForTesting() const;