Load icudtl.dat in eg2tests app hosts.

Some base i18n functions requires the icu data.
E.g.: GetPluralStringFUTF16

Change-Id: I80b2bc0f6a7b26f5da0a4daaee7fac66217396ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2449472Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813728}

ios/chrome/test/earl_grey/BUILD.gn

@@ -260,6 +260,7 @@ source_set("chrome_egtest_bundle_main+eg2") {
 
   deps = [
     "//base",
+    "//base:i18n",
     "//ui/base",
   ]
 }

ios/chrome/test/earl_grey/chrome_egtest_bundle_main.mm

@@ -10,6 +10,7 @@
 #include "base/at_exit.h"
 #include "base/check.h"
 #include "base/command_line.h"
+#include "base/i18n/icu_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/base/resource/resource_bundle.h"
@@ -49,6 +50,8 @@ class TestMain {
     // CommandLine to exist.
     base::CommandLine::Init(argc, argv);
 
+    base::i18n::InitializeICU();
+
     // Load pak files into the ResourceBundle.
     l10n_util::OverrideLocaleWithCocoaLocale();
     const std::string loaded_locale =

ios/chrome/test/earl_grey2/chrome_ios_eg2_test.gni

@@ -188,6 +188,7 @@ template("chrome_ios_eg2_test") {
     bundle_deps += [
       "//ios/chrome/app/resources",
       "//ios/third_party/gtx:gtx+bundle",
+      "//third_party/icu:icudata",
     ]
   }
 }