Add //google_apis/* to 'gn check'.

.gn

 # This file is used by the GN meta build system to find the root of the source
 # tree and to set startup options. For documentation on the values set in this
 # file, run "gn help dotfile" at the command line.
 
 # The location of the build configuration file.
 buildconfig = "//build/config/BUILDCONFIG.gn"
 
 # The secondary source root is a parallel directory tree where
 # GN build files are placed when they can not be placed directly
 # in the source tree, e.g. for third party source trees.
@@ skipping 23 matching lines @@
   #"//components/*",  # Lots of errors.
   #"//content/*",  # A whole lot of errors.
   "//courgette/*",
   "//crypto/*",
   "//data/*",
   "//dbus/*",
   "//device/*",
 
   #"//extensions/*",  # Lots of errors.
   #"//gin/*",  # Easy.
-  #"//google_apis/*",  # Easy.
+  "//google_apis/*",
   "//google_update/*",
 
   #"//gpu/*",  # Lots of errors.
   #"//ios/*",
   "//ipc/*",
 
   #"//jingle/*",
   #"//media/*",  # Lots of errors.
   #"//mojo/*",
   #"//native_client/*",
@@ skipping 13 matching lines @@
   "//sync/*",
   "//testing/*",
 
   #"//third_party/*",  # May not ever want this.
   "//tools/*",
 
   #"//ui/*",  # Just a few problems.
   "//url/*",
   "//v8/*",
 ]