[linux] remove dependency between nacl_helper and media

components/nacl/loader/BUILD.gn

 # Copyright 2015 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/nacl/config.gni")
 import("//testing/test.gni")
 
 assert(enable_nacl)
 
@@ skipping 43 matching lines @@
     "//content/public/common/sandbox_init.h",
   ]
 }
 
 source_set("loader") {
   public_deps = [
     ":minimal",
   ]
   deps = [
     "//components/nacl/common",
-    "//content/public/common",
     "//ppapi/shared_impl",
   ]
 
   data_deps = [
     "//ppapi/native_client:irt",
     "//ppapi/native_client/src/untrusted/pnacl_support_extension",
   ]
 }
 
 test("nacl_loader_unittests") {
@@ skipping 32 matching lines @@
       "nacl_helper_linux.cc",
       "nacl_helper_linux.h",
     ]
 
     deps = [
       ":loader",
       "//base",
       "//build/config/sanitizers:deps_no_options",
       "//components/nacl/common:switches",
       "//components/nacl/loader/sandbox_linux",
-      "//content/public/common",
+      "//content/public/common:content_descriptors",
       "//crypto",
       "//ipc",
       "//mojo/edk/system",
       "//sandbox/linux:sandbox_services",
       "//url/ipc:url_ipc",
     ]
 
     cflags = [ "-fPIE" ]
 
     ldflags = [ "-pie" ]
@@ skipping 152 matching lines @@
       "${root_out_dir}/nacl_helper_nonsfi_unittests_main",
     ]
     outputs = [
       "${root_build_dir}/{{source_file_part}}",
     ]
     deps = [
       ":nacl_helper_nonsfi_unittests_main",
     ]
   }
 }