cc: Fix recording of GPU rasterization histogram for renderer compositor.

The recording was disabled in https://codereview.chromium.org/1464313007/

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1511743004

Cr-Commit-Position: refs/heads/master@{#364456}
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 35551e62..6c4008b 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -881,6 +881,7 @@
     "trees/layer_tree_host_unittest_occlusion.cc",
     "trees/layer_tree_host_unittest_picture.cc",
     "trees/layer_tree_host_unittest_proxy.cc",
+    "trees/layer_tree_host_unittest_record_gpu_histogram.cc",
     "trees/layer_tree_host_unittest_scroll.cc",
     "trees/layer_tree_host_unittest_video.cc",
     "trees/layer_tree_impl_unittest.cc",