Revert of Shrink gn's chrome.dll - now smaller than gyp's

content/gpu/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 
 # See //content/BUILD.gn for how this works.
 group("gpu") {
   visibility = [ "//content/*" ]  # This is an internal content API.
 
   if (is_component_build) {
     public_deps = [
       "//content",
     ]
   } else {
     public_deps = [
       ":gpu_sources",
     ]
   }
 }
 
-if (is_component_build) {
-  link_target_type = "source_set"
-} else {
-  link_target_type = "static_library"
-}
-target(link_target_type, "gpu_sources") {
+source_set("gpu_sources") {
   # This is an internal content API. Code outside of the content "component"
   # (like content/test and content/shell) should depend on ":gpu" above.
   visibility = [ "//content/*" ]
 
   sources = [
     "gpu_child_thread.cc",
     "gpu_child_thread.h",
     "gpu_main.cc",
     "gpu_process.cc",
     "gpu_process.h",
@@ skipping 62 matching lines @@
   }
 
   if (use_ozone) {
     deps += [ "//ui/ozone" ]
   }
 
   if (enable_vulkan) {
     deps += [ "//gpu/vulkan" ]
   }
 }