Handle both plural and singular tab switcher content descriptions.

build/android/lint/suppressions.xml

 <?xml version="1.0" encoding="utf-8"?>
 <lint>
   <!--
 STOP! It looks like you want to suppress some lint errors:
 - Have you tried identifing the offending patch?
   Ask the author for a fix and/or revert the patch.
 - It is preferred to add suppressions in the code instead of
   sweeping it under the rug here. See:
 
     http://developer.android.com/tools/debugging/improving-w-lint.html
@@ skipping 61 matching lines @@
   <issue id="InconsistentLayout" severity="ignore"/>
   <issue id="InflateParams" severity="ignore"/>
   <issue id="LongLogTag" severity="ignore"/>
   <issue id="MissingApplicationIcon" severity="ignore"/>
   <issue id="MissingPermission" severity="ignore"/>
   <issue id="MissingRegistered" severity="ignore"/>
   <issue id="MissingTranslation">
     <!-- http://crbug.com/450548 -->
     <ignore regexp=".*restriction_values.xml.*" />
   </issue>
+  <!--
+    TODO(estevenson) remove this once translations are added for
+    IDS_ACCESSIBILITY_TOOLBAR_BTN_TABSWITCHER_TOGGLE (http://crbug.com/635677)
+  -->
+  <issue id="MissingQuantity">
+    <ignore regexp=".*android_chrome_strings.xml" />
+  </issue>
   <issue id="MissingVersion">
     <ignore path="AndroidManifest.xml"/>
   </issue>
   <issue id="InlinedApi" severity="ignore"/>
   <issue id="NewApi">
     <ignore regexp="Attribute `paddingStart` referenced here can result in a crash on some specific devices older than API 17"/>
     <ignore path="org/chromium/base/AnimationFrameTimeHistogram$Recorder.class"/>
     <ignore path="org/chromium/base/JavaHandlerThread.class"/>
     <ignore path="org/chromium/base/SysUtils.class"/>
     <ignore path="org/chromium/chrome/browser/TtsPlatformImpl.class"/>
@@ skipping 19 matching lines @@
     <ignore path="android_webview/tools/automated_ui_tests/java/res/" />
     <!--
         This file isn't used if the target SDK version is less than 24.
         TODO(estevenson) remove this and the conditional inclusion in
         AndroidManifest.xml after rolling to SDK 24.
     -->
     <ignore path="chrome/android/java/res/xml/network_security_config.xml" />
   </issue>
   <issue id="SignatureOrSystemPermissions" severity="ignore"/>
   <issue id="UnusedAttribute" severity="ignore"/>
+  <!--
+    TODO(estevenson) remove this once translations are updated for
+    IDS_ACCESSIBILITY_TOOLBAR_BTN_TABSWITCHER_TOGGLE (http://crbug.com/635677)
+  -->
+  <issue id="UnusedQuantity">
+    <ignore regexp=".*android_chrome_strings.xml" />
+  </issue>
   <issue id="ViewConstructor" severity="ignore"/>
   <issue id="WrongCall" severity="ignore"/>
   <issue id="UselessParent">
     <ignore path="chrome/android/java/res/layout/data_reduction_promo_screen.xml" />
   </issue>
 </lint>