Make content_shell_apk build completely

build/secondary/third_party/icu/BUILD.gn

Index: build/secondary/third_party/icu/BUILD.gn
diff --git a/build/secondary/third_party/icu/BUILD.gn b/build/secondary/third_party/icu/BUILD.gn
index 1a219491e8a6ba00e82a8c9e5ebdf98794bd3c56..4f5858cf41c766fd7877d396c26d41a06e9a3053 100644
--- a/build/secondary/third_party/icu/BUILD.gn
+++ b/build/secondary/third_party/icu/BUILD.gn
@@ -2,21 +2,7 @@
 # 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.
-  #
-  # 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
-}
+import("//third_party/icu/config.gni")
 
 # Meta target that includes both icuuc and icui18n. Most targets want both.
 # You can depend on the individually if you need to.