Move //third_party/webrtc deps under enable_webrtc

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 5e4b8de22ef3a3f873f1111adad2c82e7f29f873..7d89c6b2bb893f8a8d4fe11ffcb4908d139fdfa4 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -96,9 +96,6 @@ source_set("browser") {
     "//third_party/leveldatabase",
     "//third_party/libyuv",
     "//third_party/re2",
-    "//third_party/webrtc",
-    "//third_party/webrtc/base:rtc_base",
-    "//third_party/webrtc/modules/desktop_capture:primitives",
     "//third_party/zlib",
     "//third_party/zlib:zip",
     "//ui/accessibility",
@@ -188,6 +185,9 @@ source_set("browser") {
     deps += [
       "//jingle:jingle_glue",
       "//third_party/libjingle:libjingle_webrtc",
+      "//third_party/webrtc",
+      "//third_party/webrtc/base:rtc_base",
+      "//third_party/webrtc/modules/desktop_capture:primitives",
     ]
     if (is_linux || is_mac || is_win) {
       sources += [