Declare dependency on blink_headers in targets that use blink headers

ppapi/ppapi_proxy_nacl.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common_untrusted.gypi',
@@ skipping 10 matching lines @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libppapi_proxy_nacl.a',
             'build_glibc': 0,
             'build_newlib': 0,
             'build_irt': 1,
           },
           'include_dirs': [
             '..',
           ],
           'dependencies': [
-            '../native_client/tools.gyp:prep_toolchain',
             '../base/base_nacl.gyp:base_nacl',
+            '../components/tracing_nacl.gyp:tracing_nacl',
             '../gpu/command_buffer/command_buffer_nacl.gyp:gles2_utils_nacl',
             '../gpu/gpu_nacl.gyp:command_buffer_client_nacl',
             '../gpu/gpu_nacl.gyp:command_buffer_common_nacl',
+            '../gpu/gpu_nacl.gyp:gles2_cmd_helper_nacl',
             '../gpu/gpu_nacl.gyp:gles2_implementation_nacl',
-            '../gpu/gpu_nacl.gyp:gles2_cmd_helper_nacl',
             '../gpu/gpu_nacl.gyp:gpu_ipc_nacl',
             '../ipc/ipc_nacl.gyp:ipc_nacl',
+            '../native_client/tools.gyp:prep_toolchain',
+            '../ppapi/ppapi_ipc_nacl.gyp:ppapi_ipc_nacl',
             '../ppapi/ppapi_shared_nacl.gyp:ppapi_shared_nacl',
-            '../ppapi/ppapi_ipc_nacl.gyp:ppapi_ipc_nacl',
+            '../third_party/WebKit/public/blink_headers.gyp:blink_headers',
             '../third_party/khronos/khronos.gyp:khronos_headers',
-            '../components/tracing_nacl.gyp:tracing_nacl',
           ],
         },
       ],
     }],
   ],
 }