media: Convert mojo media defines to buildflags

content/browser/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")
 import("//gpu/vulkan/features.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
 import("//printing/features/features.gni")
@@ skipping 75 matching lines @@
     "//gpu/command_buffer/client:gles2_implementation",
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/ipc/host",
     "//gpu/vulkan:features",
     "//media",
     "//media/capture",
     "//media/capture/mojo:image_capture",
     "//media/gpu/ipc/client",
     "//media/midi",
     "//media/midi:mojo",
+    "//media/mojo:features",
     "//media/mojo/interfaces",
     "//media/mojo/services",
     "//mojo/common",
     "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
     "//net",
     "//net:extras",
     "//net:http_server",
     "//ppapi/features",
@@ skipping 2001 matching lines @@
   }
 
   if (is_linux && use_dbus) {
     deps += [ "//dbus" ]
   }
 
   if (is_linux) {
     deps += [ "//third_party/boringssl" ]
   }
 
-  if (enable_mojo_media) {
-    configs += [ "//media/mojo/services:mojo_media_config" ]
-  }
-
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
 
   if (enable_ipc_fuzzer) {
     configs += [ "//tools/ipc_fuzzer:ipc_fuzzer_config" ]
   }
 
   if (use_minikin_hyphenation) {
     sources += [
       "hyphenation/hyphenation_impl.cc",
       "hyphenation/hyphenation_impl.h",
     ]
   }
 }
 
 # See comment at the top of //content/BUILD.gn for how this works.
 group("for_content_tests") {
   visibility = [ "//content/test/*" ]
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }