Work on "gn check" of content/*

content/renderer/BUILD.gn

Index: content/renderer/BUILD.gn
diff --git a/content/renderer/BUILD.gn b/content/renderer/BUILD.gn
index eaad7f2c6874f703ebc38016380ee5f44cb79ad3..7f689a5f5125a573c4773455cd653527fd842283 100644
--- a/content/renderer/BUILD.gn
+++ b/content/renderer/BUILD.gn
@@ -23,9 +23,12 @@ source_set("renderer") {
     "//crypto:platform",
 
     "//base/allocator",
+    "//cc",
     "//cc/blink",
     "//content:resources",
     "//content/common:mojo_bindings",
+    "//content/public/child",
+    "//content/public/common",
     "//gin",
     "//jingle:jingle_glue",
     "//media",
@@ -43,7 +46,10 @@ source_set("renderer") {
     "//third_party/WebKit/public:blink",
     "//third_party/widevine/cdm:version_h",
     "//ui/accessibility",
+    "//ui/base",
+    "//ui/events:events_base",
     "//ui/events:dom4_keycode_converter",
+    "//ui/gl",
     "//ui/native_theme",
     "//ui/surface",
     "//v8",
@@ -113,7 +119,6 @@ source_set("renderer") {
       "media/media_stream_constraints_util.h",
       "media/media_stream_dispatcher.h",
       "media/media_stream_dispatcher_eventhandler.h",
-      "media/media_stream_impl.h",
       "media/media_stream_track.cc",
       "media/media_stream_track.h",
     ]