Revert of Content "gn check" work.

content/gpu/BUILD.gn

Index: content/gpu/BUILD.gn
diff --git a/content/gpu/BUILD.gn b/content/gpu/BUILD.gn
index c55710a2b486dd99e9944d5ef104d2788a3da82d..7736a555e46816f5ca63381c86baf7f2f67b0479 100644
--- a/content/gpu/BUILD.gn
+++ b/content/gpu/BUILD.gn
@@ -42,19 +42,14 @@
 
   deps = [
     "//base",
-    "//base/third_party/dynamic_annotations",
-    "//components/tracing",
     "//content:export",
     "//content/public/child:child_sources",
     "//content/public/common:common_sources",
     "//gpu:gpu",
     "//gpu/ipc/common:command_buffer_traits",
     "//ipc",
-    "//media/mojo/services:application_factory",
     "//mojo/shell/public/interfaces",
     "//skia",
-    "//ui/events/ipc",
-    "//ui/gfx/ipc",
     "//ui/gl",
   ]
 
@@ -73,7 +68,6 @@
     ]
     libs = [ "setupapi.lib" ]
     deps += [
-      "//sandbox",
       "//third_party/angle:libEGL",
       "//third_party/angle:libGLESv2",
     ]
@@ -87,10 +81,6 @@
     deps += [ "//ui/events/platform/x11" ]
   }
 
-  if (use_ozone) {
-    deps += [ "//ui/ozone" ]
-  }
-
   if (enable_vulkan) {
     deps += [ "//gpu/vulkan" ]
   }