Add CC to the GN build, work on GPU more

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index da186f16e70298deedbbc57b4982fa6c1dcddff8..f3f84f94a82e70f3516723d6befd70f83c9b2a90 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -18,6 +18,7 @@ group("root") {
     #"//base(//build/toolchain/nacl:x86_newlib)",
 
     "//apps/common/api:apps_api",
+    "//cc",
     #"//chrome",
     "//components/favicon_base",
     "//components/language_usage_metrics",
@@ -38,8 +39,7 @@ group("root") {
     "//device/usb",
     #"//extensions/common/api:extensions_api",
     "//gin",
-    "//gpu/command_buffer/client",
-    "//gpu/command_buffer/service",
+    "//gpu",
     "//google_apis",
     "//ipc",
     "//mojo",
@@ -109,8 +109,7 @@ group("root") {
       # This stuff all depends on ui/surface which requires some .class jni
       # generators (ui/gl/gl.gyp:surface_jni_headers).
       "//ui/gl",
-      "//gpu/command_buffer/client",
-      "//gpu/command_buffer/service",
+      "//gpu",
       "//ui/surface",
     ]
   }