Account for failure of coordinate space transformations in browser

content/browser/frame_host/render_widget_host_view_child_frame.h

Index: content/browser/frame_host/render_widget_host_view_child_frame.h
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.h b/content/browser/frame_host/render_widget_host_view_child_frame.h
index 66fbeeafd307a349a9e83d559a2d54366e1f4df9..9af289d782d4706a25a8ac21a7fbc264875fc34d 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.h
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.h
@@ -133,12 +133,13 @@ class CONTENT_EXPORT RenderWidgetHostViewChildFrame
   void ProcessGestureEvent(const blink::WebGestureEvent& event,
                            const ui::LatencyInfo& latency) override;
   gfx::Point TransformPointToRootCoordSpace(const gfx::Point& point) override;
-  gfx::Point TransformPointToLocalCoordSpace(
+  bool TransformPointToLocalCoordSpace(const gfx::Point& point,
+                                       const cc::SurfaceId& original_surface,
+                                       gfx::Point* transformed_point) override;
+  bool TransformPointToCoordSpaceForView(
       const gfx::Point& point,
-      const cc::SurfaceId& original_surface) override;
-  gfx::Point TransformPointToCoordSpaceForView(
-      const gfx::Point& point,
-      RenderWidgetHostViewBase* target_view) override;
+      RenderWidgetHostViewBase* target_view,
+      gfx::Point* transformed_point) override;
 
   bool IsRenderWidgetHostViewChildFrame() override;