Ignore should-scroll-on-main-thread if main frame is not scrollable

cc/trees/layer_tree_host_unittest_scroll.cc

Index: cc/trees/layer_tree_host_unittest_scroll.cc
diff --git a/cc/trees/layer_tree_host_unittest_scroll.cc b/cc/trees/layer_tree_host_unittest_scroll.cc
index 303e92496b4d39551075827a01b34f0af87f19c8..bd14a13c77d738c97edb02e4f9f4071fa508f4f6 100644
--- a/cc/trees/layer_tree_host_unittest_scroll.cc
+++ b/cc/trees/layer_tree_host_unittest_scroll.cc
@@ -846,15 +846,21 @@ class LayerTreeHostScrollTestScrollZeroMaxScrollOffset
 
     root->SetMaxScrollOffset(gfx::Vector2d(100, 100));
     EXPECT_EQ(InputHandler::ScrollStarted,
-              root->TryScroll(gfx::PointF(0.0f, 1.0f), InputHandler::Gesture));
+              root->TryScroll(gfx::PointF(0.0f, 1.0f),
+                              InputHandler::Gesture,
+                              true));
 
     root->SetMaxScrollOffset(gfx::Vector2d(0, 0));
     EXPECT_EQ(InputHandler::ScrollIgnored,
-              root->TryScroll(gfx::PointF(0.0f, 1.0f), InputHandler::Gesture));
+              root->TryScroll(gfx::PointF(0.0f, 1.0f),
+                              InputHandler::Gesture,
+                              true));
 
     root->SetMaxScrollOffset(gfx::Vector2d(-100, -100));
     EXPECT_EQ(InputHandler::ScrollIgnored,
-              root->TryScroll(gfx::PointF(0.0f, 1.0f), InputHandler::Gesture));
+              root->TryScroll(gfx::PointF(0.0f, 1.0f),
+                              InputHandler::Gesture,
+                              true));
 
     EndTest();
   }