GN: Add //ui/base/ime, fix up printing on mac

printing/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/config/ui.gni")
 if (is_mac) {
   import("//build/config/mac/mac_sdk.gni")
 }
 if (is_android) {
@@ skipping 208 matching lines @@
     "//ui/gfx:test_support",
     "//ui/gfx/geometry",
   ]
 }
 
 if (use_cups) {
   config("cups") {
     defines = [ "USE_CUPS" ]
 
     if (is_mac) {
-      libs = [ "libcups.dylib" ]
+      ldflags = [ "$mac_sdk_path/usr/lib/libcups.dylib" ]
     } else {
       libs = exec_script("cups_config_helper.py", [ "--libs-for-gn" ], "value")
     }
   }
 }
 
 if (is_android) {
   generate_jni("printing_jni_headers") {
     sources = [
       "android/java/src/org/chromium/printing/PrintingContext.java",
     ]
     jni_package = "printing"
   }
 
   # TODO(GYP)
   #{
   #  'target_name': 'printing_java',
   #  'type': 'none',
   #  'variables': {
   #    'java_in_dir': '../printing/android/java',
   #  },
   #  'dependencies': [
   #    '../base/base.gyp:base_java',
   #  ],
   #  'includes': [ '../build/java.gypi'  ],
   #}
 }