Only scroll on main if the targeted frames need to scroll on main

third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp

Index: third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp b/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
index 7e022a42b2eabb0f0b29719a3d16f0b2ced210ff..24bdf713dc49dc96cec156c32d75146a0d685a4c 100644
--- a/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
+++ b/third_party/WebKit/Source/web/tests/FrameThrottlingTest.cpp
@@ -496,7 +496,9 @@ TEST_F(FrameThrottlingTest, ScrollingCoordinatorShouldSkipThrottledFrame) {
   compositeFrame();
   EXPECT_FALSE(frameElement->contentDocument()->view()->canThrottleRendering());
   // The fixed background in the throttled sub frame should be considered.
-  EXPECT_TRUE(document().view()->shouldScrollOnMainThread());
+  EXPECT_TRUE(
+      frameElement->contentDocument()->view()->shouldScrollOnMainThread());
+  EXPECT_FALSE(document().view()->shouldScrollOnMainThread());
 }
 
 TEST_F(FrameThrottlingTest, ScrollingCoordinatorShouldSkipThrottledLayer) {