Move configs out of targets in GN build files.

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("//testing/test.gni")
 
 pdf_use_skia = false
 
 declare_args() {
   # On Android there's no system FreeType. On Windows and Mac, only a few
@@ skipping 375 matching lines @@
     # core/src/fxcodec/fx_libopenjpeg/src/fx_mct.c does an pointer-to-int
     # conversion to check that an address is 16-bit aligned (benign).
     cflags_c = [ "-Wno-pointer-to-int-cast" ]
   }
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
 }
 
+config("fxge_warnings") {
+  if (is_clang) {
+    cflags = [
+      # http://code.google.com/p/pdfium/issues/detail?id=188
+      "-Wno-switch",
+    ]
+  }
+}
+
 static_library("fxcrt") {
   sources = [
     "core/include/fxcrt/fx_basic.h",
     "core/include/fxcrt/fx_bidi.h",
     "core/include/fxcrt/fx_coordinates.h",
     "core/include/fxcrt/fx_ext.h",
     "core/include/fxcrt/fx_memory.h",
     "core/include/fxcrt/fx_safe_types.h",
     "core/include/fxcrt/fx_stream.h",
     "core/include/fxcrt/fx_string.h",
@@ skipping 91 matching lines @@
     "core/src/fxge/ge/fx_ge_device.cpp",
     "core/src/fxge/ge/fx_ge_font.cpp",
     "core/src/fxge/ge/fx_ge_fontmap.cpp",
     "core/src/fxge/ge/fx_ge_linux.cpp",
     "core/src/fxge/ge/fx_ge_path.cpp",
     "core/src/fxge/ge/fx_ge_ps.cpp",
     "core/src/fxge/ge/fx_ge_text.cpp",
     "core/src/fxge/ge/text_int.h",
   ]
 
-  config("fxge_warnings") {
-    if (is_clang) {
-      cflags = [
-        # http://code.google.com/p/pdfium/issues/detail?id=188
-        "-Wno-switch",
-      ]
-    }
-  }
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
     ":fxge_warnings",
   ]
 
   if (pdf_use_skia) {
     sources = [
       "core/src/fxge/skia/fx_skia_blitter_new.cpp",
@@ skipping 259 matching lines @@
     "//v8",
     "//v8/include",
     "."
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
 }