Make more of content pass "gn check"

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index aea09ca4c6213eb5cb4106918313a5197ef1428b..54806cc91790c410d03576a53688c4b0fc1a8162 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -25,7 +25,10 @@ source_set("browser") {
   deps = [
     "//base",
     "//base:base_static",
+    "//base/third_party/dynamic_annotations",
     "//components/mime_util",
+    "//components/tracing",
+    "//components/tracing:startup_tracing",
     "//components/url_formatter",
     "//content:resources",
     "//content/browser/background_sync:background_sync_proto",
@@ -40,7 +43,13 @@ source_set("browser") {
     "//device/battery",
     "//device/vibration",
     "//google_apis",
+    "//gpu",
+    "//gpu/command_buffer/client:gles2_implementation",
+    "//ipc/mojo",
+    "//media",
+    "//media/midi",
     "//mojo/common",
+    "//mojo/converters/network",
     "//mojo/public/cpp/bindings",
     "//mojo/shell",
     "//mojo/shell/public/cpp:cpp_for_chromium",
@@ -52,9 +61,13 @@ source_set("browser") {
     "//skia",
     "//sql",
     "//third_party/WebKit/public:blink_headers",
+    "//third_party/angle:angle_common",
     "//third_party/kasko:kasko_features",
     "//third_party/npapi",
     "//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",
@@ -68,6 +81,7 @@ source_set("browser") {
     "//ui/gl",
     "//ui/native_theme",
     "//ui/resources",
+    "//ui/shell_dialogs",
     "//ui/snapshot",
   ]