Refactor browser process coordinate transformation methods

content/browser/renderer_host/delegated_frame_host.h

Index: content/browser/renderer_host/delegated_frame_host.h
diff --git a/content/browser/renderer_host/delegated_frame_host.h b/content/browser/renderer_host/delegated_frame_host.h
index f0d6b2423ed5f86d4fb56156219d6b7748c8c45c..2fbf631347907802469710681e9303bd74ad4502 100644
--- a/content/browser/renderer_host/delegated_frame_host.h
+++ b/content/browser/renderer_host/delegated_frame_host.h
@@ -168,9 +168,17 @@ class CONTENT_EXPORT DelegatedFrameHost
   // Surface, find the relative transform between the Surfaces and apply it
   // to a point. If a Surface has not yet been created this returns the
   // same point with no transform applied.
-  void TransformPointToLocalCoordSpace(const gfx::Point& point,
-                                       const cc::SurfaceId& original_surface,
-                                       gfx::Point* transformed_point);
+  gfx::Point TransformPointToLocalCoordSpace(
+      const gfx::Point& point,
+      const cc::SurfaceId& original_surface);
+
+  // Given a RenderWidgetHostViewBase that renders to a Surface that is
+  // contained within this class' Surface, find the relative transform between
+  // the Surfaces and apply it to a point. If a Surface has not yet been
+  // created this returns the same point with no transform applied.
+  gfx::Point TransformPointToCoordSpaceForView(
+      const gfx::Point& point,
+      RenderWidgetHostViewBase* target_view);
 
   // Exposed for tests.
   cc::SurfaceId SurfaceIdForTesting() const { return surface_id_; }