Remove the clip parameter from ContentLayerClient.

cc/layers/picture_layer_unittest.cc

Index: cc/layers/picture_layer_unittest.cc
diff --git a/cc/layers/picture_layer_unittest.cc b/cc/layers/picture_layer_unittest.cc
index 4f61722205207053e7f46d66f1dae90f6aff9c3f..97751fde77ac5f869a835ff6044348c928f1b378 100644
--- a/cc/layers/picture_layer_unittest.cc
+++ b/cc/layers/picture_layer_unittest.cc
@@ -27,9 +27,8 @@ class MockContentLayerClient : public ContentLayerClient {
  public:
   gfx::Rect PaintableRegion() override { return gfx::Rect(); }
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
-      const gfx::Rect& clip,
       PaintingControlSetting picture_control) override {
-    return DisplayItemList::Create(clip, DisplayItemListSettings());
+    return DisplayItemList::Create(gfx::Rect(), DisplayItemListSettings());
   }
   bool FillsBoundsCompletely() const override { return false; };
   size_t GetApproximateUnsharedMemoryUsage() const override { return 0; }