GN: Make content_shell and webkit_unit_tests work in component build

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("//content/content.gni")
 
 # We don't support x64 prior to Win7 and D3DCompiler_43.dll is not needed on
 # Vista+.
 need_d3dcompiler = (is_win && cpu_arch == "x86" && directxsdk_exists)
 
 source_set("gpu") {
   visibility = "//content/*"
   sources = [
     "gpu_main.cc",
@@ skipping 29 matching lines @@
     ]
   }
 
   if (need_d3dcompiler) {
     deps += [ ":extract_d3dcompiler" ]
   }
 
   if (is_chromeos && cpu_arch != "arm") {
     configs += [ "//third_party/libva/libva_config" ]
   }
+
+  if (use_x11) {
+    deps += [ "//ui/events/platform/x11" ]
+  }
 }
 
 if (need_d3dcompiler) {
   action("extract_d3dcompiler") {
     visibility = ":*"
     script = "//build/extract_from_cab.py"
 
     cabfile = "//third_party/directxsdk/files/Redist/Jun2010_D3DCompiler_43_x86.cab"
     dllfile = "D3DCompiler_43.dll"
 
     inputs = [ cabfile ]
     outputs = [ "$root_out_dir/$dllfile" ]
 
     args = [
       rebase_path(cabfile, root_build_dir),
       dllfile,
       rebase_path(root_out_dir, root_build_dir),
     ]
   }
 }