Add GN template for android_assets(). Use it in content_shell_apk.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 67b2413eaf16798b1e14f9a9e21a8b9643a4553f..5d03276a741217066dbbda2bc8e1b0b550654cfb 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -5,6 +5,7 @@
 import("//build/config/compiler/compiler.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
+import("//third_party/icu/config.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
@@ -1021,6 +1022,20 @@ component("i18n") {
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
 
+if (is_android) {

[pkotwicz, 2015/10/24 03:46:03]

Shouldn't this ideally be in third_party/icu
third_party/icu is in a separate repository so I understand why you don't want
to put it here as part of this CL.

Can you please add a TODO?

[agrieve, 2015/10/25 17:32:09]

My thinking was that it was fine here since base/i18n is a thing and what you
use to initialize icu

+  android_assets("icu_assets") {
+    if (icu_use_data_file) {
+      deps = [
+        "//third_party/icu:icudata",
+      ]
+      sources = [
+        "$root_build_dir/icudtl.dat",
+      ]
+    }
+    enable_compression = false
+  }
+}
+
 if (is_ios || is_win || (is_linux && !is_chromeos)) {
   # TODO(GYP): Figure out which of these work and are needed on other platforms.
   test("base_perftests") {