cc: Move draw params from SetExternalDrawConstraints to OnDraw

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index d2bdac15a48de236d191f0c3d7d217729285977c..b42fcaa3c8e02e148979adcfcc34aacbb5a26fdc 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -266,7 +266,7 @@ void PictureLayerImpl::AppendQuads(RenderPass* render_pass,
 
   // Ignore missing tiles outside of viewport for tile priority. This is
   // normally the same as draw viewport but can be independently overridden by
-  // embedders like Android WebView with SetExternalDrawConstraints.
+  // embedders like Android WebView with SetExternalTilePriorityConstraints.
   gfx::Rect scaled_viewport_for_tile_priority = gfx::ScaleToEnclosingRect(
       viewport_rect_for_tile_priority_in_content_space_, max_contents_scale);