[linux] remove dependency between nacl_helper and media

ui/gl/BUILD.gn

Index: ui/gl/BUILD.gn
diff --git a/ui/gl/BUILD.gn b/ui/gl/BUILD.gn
index 8f9896b54cde15ba62750257c21b0a3fe57ec56d..51f8584e5b73c3a9d1d20eeeb3f0aa3ba19b1240 100644
--- a/ui/gl/BUILD.gn
+++ b/ui/gl/BUILD.gn
@@ -100,8 +100,6 @@ component("gl") {
     "gl_surface_overlay.h",
     "gl_surface_stub.cc",
     "gl_surface_stub.h",
-    "gl_switches.cc",
-    "gl_switches.h",
     "gl_version_info.cc",
     "gl_version_info.h",
     "gpu_switching_manager.cc",
@@ -133,6 +131,7 @@ component("gl") {
     "//base/third_party/dynamic_annotations",
   ]
   public_deps = [
+    ":switches",
     "//base",
     "//third_party/mesa:mesa_headers",
     "//ui/events/platform",
@@ -264,6 +263,20 @@ component("gl") {
   }
 }
 
+source_set("switches") {
+  sources = [
+    "gl_export.h",
+    "gl_switches.cc",
+    "gl_switches.h",
+  ]
+
+  defines = [ "GL_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+  ]
+}
+
 static_library("gl_unittest_utils") {
   testonly = true
   sources = [