Move ENABLE_PEPPER_CDMS to a buildflag header.

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("//media/media_options.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
 source_set("browser") {
@@ skipping 71 matching lines @@
     "//media/midi",
     "//media/mojo/interfaces",
     "//media/mojo/interfaces:image_capture",
     "//mojo/common",
     "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
     "//net",
     "//net:extras",
     "//net:http_server",
+    "//ppapi/features",
     "//services/file:lib",
     "//services/file/public/cpp",
     "//services/file/public/interfaces",
     "//services/shell",
     "//services/shell/public/cpp",
     "//services/shell/public/interfaces",
     "//services/shell/runner/common",
     "//services/shell/runner/host:lib",
     "//skia",
     "//sql",
@@ skipping 1833 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }