cc: Initialize wait_for_beginframe_interval in tests.

cc/trees/layer_tree_host_perftest.cc

Index: cc/trees/layer_tree_host_perftest.cc
diff --git a/cc/trees/layer_tree_host_perftest.cc b/cc/trees/layer_tree_host_perftest.cc
index 8e762f44070d9a5dc90d04a53b15beed1fac83cd..845b1305e59a86be0bc4d7488fbb0736eddc44f5 100644
--- a/cc/trees/layer_tree_host_perftest.cc
+++ b/cc/trees/layer_tree_host_perftest.cc
@@ -44,6 +44,7 @@ class LayerTreeHostPerfTest : public LayerTreeTest {
   }
 
   void InitializeSettings(LayerTreeSettings* settings) override {
+    settings->wait_for_beginframe_interval = false;
     settings->renderer_settings.disable_display_vsync = true;
   }