Remove -Wno-unused-private-field clang warning suppression.

third_party/cld_2/BUILD.gn

Index: third_party/cld_2/BUILD.gn
diff --git a/third_party/cld_2/BUILD.gn b/third_party/cld_2/BUILD.gn
index 485f4acebc05b7cfc0f59904ff923728dc0acbb6..b37055ea7d542772bf3f3d9bcb36787e8f3891c1 100644
--- a/third_party/cld_2/BUILD.gn
+++ b/third_party/cld_2/BUILD.gn
@@ -73,6 +73,15 @@ source_set("cld2_platform_impl") {
   }
 }
 
+config("cld2_warnings") {
+  if (is_clang) {
+    cflags = [
+      # hunspell has unused private fields.

[Nico, 2015/07/09 01:58:16]

s/hunspell/cld_2/

[benwells, 2015/07/09 11:43:02]

oops, done.

+      "-Wno-unused-private-field",
+    ]
+  }
+}
+
 static_library("cld2_static") {
   sources = gypi_values.cld2_core_impl_sources
   include_dirs = [
@@ -85,7 +94,10 @@ static_library("cld2_static") {
     ":cld2_data",
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+    ":cld2_warnings",
+  ]
 }
 
 config("cld2_dynamic_mode_config") {
@@ -104,6 +116,7 @@ static_library("cld2_dynamic") {
   configs += [
     ":cld2_dynamic_mode_config",
     "//build/config/compiler:no_chromium_code",
+    ":cld2_warnings",
   ]
 }