Update from chromium https://crrev.com/302282

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 8cb8e8ad1b33b40d42a3f7faa5ca94756a6b88d4..292d476cfe7b288dd376a5296bb225b6c51df9f7 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -559,6 +559,8 @@ source_set("test_support") {
     "test/layer_tree_host_common_test.h",
     "test/layer_tree_json_parser.cc",
     "test/layer_tree_json_parser.h",
+    "test/layer_tree_pixel_resource_test.cc",
+    "test/layer_tree_pixel_resource_test.h",
     "test/layer_tree_pixel_test.cc",
     "test/layer_tree_pixel_test.h",
     "test/layer_tree_test.cc",
@@ -598,6 +600,8 @@ source_set("test_support") {
     "test/test_gles2_interface.h",
     "test/test_gpu_memory_buffer_manager.cc",
     "test/test_gpu_memory_buffer_manager.h",
+    "test/test_image_factory.cc",
+    "test/test_image_factory.h",
     "test/test_now_source.cc",
     "test/test_now_source.h",
     "test/test_occlusion_tracker.h",
@@ -740,6 +744,7 @@ test("cc_unittests") {
     "trees/layer_tree_host_pixeltest_masks.cc",
     "trees/layer_tree_host_pixeltest_on_demand_raster.cc",
     "trees/layer_tree_host_pixeltest_readback.cc",
+    "trees/layer_tree_host_pixeltest_synchronous.cc",
     "trees/layer_tree_host_unittest.cc",
     "trees/layer_tree_host_unittest_animation.cc",
     "trees/layer_tree_host_unittest_context.cc",