cc: Don't schedule top controls animation when there isn't one

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 56eaecca4e2da74f1d308098af38db97d10f5803..3dbd394cb17484a597f89b7421e84359ec630fa6 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -5811,5 +5811,21 @@ TEST_F(LayerTreeHostImplTest, SimpleSwapPromiseMonitor) {
   }
 }
 
+class LayerTreeHostImplWithTopControlsTest : public LayerTreeHostImplTest {
+ public:
+  virtual void SetUp() OVERRIDE {
+    LayerTreeSettings settings = DefaultSettings();
+    settings.calculate_top_controls_position = true;
+    CreateHostImpl(settings, CreateOutputSurface());
+  }
+};
+
+TEST_F(LayerTreeHostImplWithTopControlsTest, NoIdleAnimations) {
+  SetupScrollAndContentsLayers(gfx::Size(100, 100))
+      ->SetScrollOffset(gfx::Vector2d(0, 10));
+  host_impl_->Animate(base::TimeTicks(), base::Time());
+  EXPECT_FALSE(did_request_redraw_);
+}
+
 }  // namespace
 }  // namespace cc