Propagate scrolling/marginwidth/marginheight property values to child frame.

third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp

Index: third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp b/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
index 00394f894eb134eaacead3a88682e194c8bc4e6e..3f29189662cf989692569030c5f4a15300c5ae27 100644
--- a/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
@@ -85,6 +85,9 @@ public:
     SandboxFlags sandboxFlags() const override { return SandboxNone; }
     void dispatchLoad() override { }
     void renderFallbackContent() override { }
+    ScrollbarMode scrollingMode() const override { return ScrollbarAuto; }
+    int marginWidth() const override { return -1; }
+    int marginHeight() const override { return -1; }
 };
 
 class FrameFetchContextTest : public ::testing::Test {