Make content_shell link in the GN build.

build/secondary/third_party/icu/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.
 
 declare_args() {
   # Tells icu to load an external data file rather than rely on the icudata
   # being linked directly into the binary.
-  icu_use_data_file = false
+  #
+  # This flag is a bit confusing. As of this writing, icu.gyp set the value to
+  # 0 but common.gypi sets the value to 1 for most platforms (and the 1 takes
+  # precedence).
+  #
+  # TODO(GYP) We'll probably need to enhance this logic to set the value to
+  # true or false in similar circumstances. Note that in the GYP build, some
+  # other projects access this variable. If we need to do a similar thing,
+  # we should probably make an icu config file (//third_party/icu/config.gni)
+  # with this flag in it rather than making it global.
+  icu_use_data_file = true
 }
 
 # Meta target that includes both icuuc and icui18n. Most targets want both.
 # You can depend on the individually if you need to.
 group("icu") {
   deps = [
     ":icui18n",
     ":icuuc",
   ]
 }
@@ skipping 444 matching lines @@
   if (is_ios) {
     # TODO(GYP): Support mac resource bundle shown below.
     # 'link_settings': {
     #   'mac_bundle_resources': [
     #     'source/data/in/icudtl.dat',
     #   ],
     # }
   } else {
     copy("icudata") {
       if (is_android) {
-        sources = [ "android/icudt.dat" ]
+        sources = [ "android/icudtl.dat" ]
       } else {
         sources = [ "source/data/in/icudtl.dat" ]
       }
 
       outputs = [ "$root_out_dir/icudtl.dat" ]
     }
   }
 } else {
   if (is_win) {
     # On Windows the target DLL is pre-built so just use a copy rule.
@@ skipping 13 matching lines @@
         sources = [ "mac/icudtl_dat.S" ]
       } else if (is_android) {
         sources = [ "android/icudtl_dat.S" ]
       } else {
         assert(false, "No icu data for this platform")
       }
       defines = [ "U_HIDE_DATA_SYMBOL" ]
     }
   }
 }