Add a compiled_resources.gyp for network_Ui and fix compiler errors.

ui/webui/resources/js/compiled_resources.gyp

Index: ui/webui/resources/js/compiled_resources.gyp
diff --git a/ui/webui/resources/js/compiled_resources.gyp b/ui/webui/resources/js/compiled_resources.gyp
index b8f8aa37e4d8b8410a5d3d9c40ac69c9685192d8..668413a624419e95eb9e0bf8c04e3a577158f9a4 100644
--- a/ui/webui/resources/js/compiled_resources.gyp
+++ b/ui/webui/resources/js/compiled_resources.gyp
@@ -30,14 +30,15 @@
       'target_name': 'util',
       'variables': {
         'depends': ['cr.js'],
-        'externs': ['<(CLOSURE_DIR)/externs/chrome_send_externs.js'],
+        # TODO(jlklein): Get <(VARIABLES) in transient externs/depends working.
+        'externs': ['../../../../third_party/closure_compiler/externs/chrome_send_externs.js'],
       },
       'includes': ['../../../../third_party/closure_compiler/compile_js.gypi'],
     },
     {
       'target_name': 'parse_html_subset',
       'variables': {
-        'externs': ['<(CLOSURE_DIR)/externs/pending_compiler_externs.js'],
+        'externs': ['../../../../third_party/closure_compiler/externs/pending_compiler_externs.js'],
       },
       'includes': ['../../../../third_party/closure_compiler/compile_js.gypi'],
     },