This adds a formatter for plurals that works for all locales.

chrome/common/plural_formatter_example.grd

Index: chrome/common/plural_formatter_example.grd
diff --git a/chrome/common/plural_formatter_example.grd b/chrome/common/plural_formatter_example.grd
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index 0000000000000000000000000000000000000000..31dddee1e00ba43b7c1995acc419979077ac6527
--- /dev/null
+++ b/chrome/common/plural_formatter_example.grd
@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+
+This file contains an EXAMPLE of the six messages needed to use the
+PluralFormatter class.  This file is not (and SHOULD NOT BE) used by
+any code: it just contains example messages that will be added to the
+main string resource .grd file.
+
+See plural_formatter.h for more information.
+
+-->
+
+<grit base_dir="." latest_public_release="0" current_release="1"
+      source_lang_id="en" enc_check="möl">
+  <release seq="1" allow_pseudo="false">
+    <messages fallback_to_english="true">
+
+<!-- Begin Example Messages -->
+
+      <if expr="lang in ['ar', 'ro', 'lv']">
+      <message name="IDS_EELS_ZERO"
+               desc="Describes the number of eels in a hovercraft.  NUMBER_ZERO is 0 (Arabic, Latvian) or 0, 2..19, 101..119, ... (Romanian). For other languages, do NOT translate.">
+        Your hovercraft has <ph name="NUMBER_ZERO"><ex>0</ex>#</ph> eels
+      </message>
+      </if>
+      <if expr="lang not in ['ar', 'ro', 'lv']">
+      <message translateable="false" name="IDS_EELS_ZERO"
+               desc="">
+        NA
+      </message>
+      </if>
+
+      <if expr="lang not in ['zh-CN', 'zh-TW', 'ko', 'ja', 'vi', 'tr', 'kn']">
+      <message name="IDS_EEL_ONE"
+               desc="Describes the number of eels in a hovercraft.  NUMBER_ONE is one or one-like numbers : 1 (many European and most Indian languages), 1 and 0 (French, Brazilian Portuguese and Hindi), 1,21,31, .. (Russian, Ukrainian, Croatian, Serbian, Latvian, Lithuanian), or 1, 101, 201, .. (Slovenian). Do NOT translate this for CJK, Vietnamese, Turkish and Kannada">
+        Your hovercraft has <ph name="NUMBER_ONE"><ex>1</ex>#</ph> eel.
+      </message>
+      </if>
+      <if expr="lang in ['zh-CN', 'zh-TW', 'ko', 'ja', 'vi', 'tr', 'kn']">
+      <message translateable="false" name="IDS_EEL_SINGULAR"
+               desc="">
+        NA
+      </message>
+      </if>
+
+      <if expr="lang in ['ga', 'sl', 'ar']">
+      <message name="IDS_EELS_TWO"
+               desc="Describes the number of eels in a hovercraft.  NUMBER_TWO is two or two-like/dual numbers :  2 (Arabic and Irish) or  2, 102, 202 ... (Slovenian). For other languages, do NOT translated.">
+        Your hovercraft has <ph name="NUMBER_TWO"><ex>2</ex>#</ph> eels
+      </message>
+      </if>
+      <if expr="lang not in ['ga', 'sl', 'ar']">
+      <message translateable="false" name="IDS_EELS_TWO"
+               desc="">
+        NA
+      </message>
+      </if>
+
+      <if expr="lang  in ['ru', 'lt', 'hr', 'uk', 'cs', 'sk', 'pl', 'sl', 'ar']">
+      <message name="IDS_EELS_FEW"
+               desc="Describes the number of eels in a hovercraft.  NUMBER_FEW is few or few-like numbers in Arabic, Russian, Polish, Croatian, Serbian, Ukrainian, Czech, Slovak, Slovenian, Latvian. For other languages, do NOT translate.">
+        Your hovercraft has <ph name="NUMBER_FEW"><ex>3</ex>#</ph> eels
+      </message>
+      </if>
+      <if expr="lang not in ['ru', 'lt', 'hr', 'uk', 'cs', 'sk', 'pl', 'sl', 'ar']">
+      <message translateable="false" name="IDS_EELS_FEW"
+               desc="">
+        NA
+      </message>
+      </if>
+
+      <if expr="lang == 'ar'">
+      <message name="IDS_EELS_MANY"
+               desc="Describes the number of eels in a hovercraft.  NUMBER_MANY is 11 through 99 in Arabic. For all other languages, do NOT translate.">
+        Your hovercraft has <ph name="NUMBER_MANY"><ex>23</ex>#</ph> eels
+      </message>
+      </if>
+      <if expr="lang != 'ar'">
+      <message translateable="false" name="IDS_EELS_MANY"
+               desc="">
+        NA
+      </message>
+      </if>
+
+      <message name="IDS_EELS_DEFAULT"
+               desc="Describes the number of eels in a hovercraft.  This is necessary for every language. This is the default for all the numbers NOT covered by special cases (singular, dual/two, few, many) some languages need. For CJK, Vietnamese, Turkish and Kannada, this is the only string necessary. For languages with singular-plural distinction, this is the generic plural. For Lithuanian, NUMBER_DEFAULT is 11 .. 19.">
+        Your hovercraft has <ph name="NUMBER_DEFAULT"><ex>42</ex>#</ph> eels.
+      </message>
+
+<!-- End Example Messages -->
+
+    </messages>
+  </release>
+</grit>