Fix GN review comments.

chrome/common/extensions/api/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/json_schema.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("api.gyp") ],
@@ skipping 21 matching lines @@
     if (is_chrome_branded) {
       schema_sources += gypi_values.chromeos_branded_schema_files
     }
   }
   if (enable_webrtc) {
     schema_sources += gypi_values.webrtc_schema_files
   }
 }
 
 schema_deps = [
-  # Different APIs include some headers crom chrome/common that in turn
+  # Different APIs include some headers from chrome/common that in turn
   # include generated headers from these targets.
   # TODO(brettw) this should be made unnecessary if possible.
   "//components/metrics/proto",
   "//device/serial",
 
   "//content/public/browser",
   "//skia",
   "//sync",
 ]
 if (is_chromeos) {
   # deps += [ "<(DEPTH)/chrome/chrome.gyp:drive_proto" ]  TODO)GYP)
 }
 
 json_schema_bundle("api_bundle") {
   visibility = ":api"
   sources = schema_sources
   if (!is_android) {
     sources += gypi_values.main_non_compiled_schema_files
   }
 
   root_namespace = "extensions::api"
   deps = schema_deps + [ ":api_compile" ]
-
 }
 
 json_schema_compile("api_compile") {
   visibility = ":*"
   sources = schema_sources
   root_namespace = "extensions::api"
   deps = schema_deps
 }