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 93 matching lines @@
     "//third_party/WebKit/public:blink_headers",
     "//third_party/WebKit/public:image_resources",
     "//third_party/WebKit/public:mojo_bindings",
     "//third_party/WebKit/public:offscreen_canvas_mojo_bindings",
     "//third_party/WebKit/public:resources",
     "//third_party/angle:angle_common",
     "//third_party/icu",
     "//third_party/kasko:kasko_features",
     "//third_party/libyuv",
     "//third_party/re2",
+    "//third_party/widevine/cdm:cdm_features",
     "//third_party/zlib",
     "//third_party/zlib:zip",
     "//ui/accessibility",
     "//ui/accessibility:ax_gen",
     "//ui/base",
     "//ui/base/ime",
     "//ui/display",
     "//ui/display/types",
     "//ui/events",
     "//ui/events:gesture_detection",
@@ skipping 1811 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }