Remove the clip parameter from ContentLayerClient.

cc/trees/layer_tree_host_common_unittest.cc

Index: cc/trees/layer_tree_host_common_unittest.cc
diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
index a4211cb0b3e52e8128c79ace8d814895ead37c34..6a554db9ec19a365f843e360a73f5c7aba230ed9 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -63,7 +63,6 @@ class MockContentLayerClient : public ContentLayerClient {
   ~MockContentLayerClient() override {}
   gfx::Rect PaintableRegion() override { return gfx::Rect(); }
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
-      const gfx::Rect& clip,
       PaintingControlSetting picture_control) override {
     NOTIMPLEMENTED();
     return nullptr;