Add GPU command buffer sevice and protobuf to GN build

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index ab33277908d397478ac767bf1a04eaf7a2073137..a39045e3fd6d7f0049141ea3141b7a92a1249559 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -34,6 +34,7 @@ group("root") {
     "//device/usb",
     #"//extensions/common/api:extensions_api",
     "//gpu/command_buffer/client",
+    "//gpu/command_buffer/service",
     "//ipc",
     "//mojo",
     "//net",
@@ -49,6 +50,7 @@ group("root") {
     "//third_party/libwebm",
     "//third_party/libwebp",
     "//third_party/ots",
+      "//third_party/protobuf:protobuf_lite",
     "//third_party/qcms",
     "//third_party/re2",
     "//third_party/smhasher:cityhash",
@@ -83,8 +85,11 @@ group("root") {
       "//components/os_crypt",
       "//crypto",
       "//gpu/command_buffer/client",  # Needs Skia.
+      "//gpu/command_buffer/service",
       "//net",
       "//third_party/libusb",
+      # Should work, but staging this landing for Android separately.
+      "//third_party/protobuf:protobuf_lite",
       #"//third_party/WebKit/Source/platform",
       "//third_party/WebKit/Source/wtf",  # TODO(brettw) re-enable for Android.
       "//tools/gn",