Fix ICU code showing up on Cocoa hung renderer dialog's "exit" button.

Bug: 803855
Change-Id: Ibecaea32f973f907583ab8f01db4ae14a6f08cc6
Reviewed-on: https://chromium-review.googlesource.com/882126
Commit-Queue: Bret Sepulveda <bsep@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531644}

chrome/app/nibs/HungRendererDialog.xib

@@ -92,7 +92,7 @@
                             <button verticalHuggingPriority="750" id="12">
                                 <rect key="frame" x="14" y="12" width="96" height="32"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxY="YES"/>
-                                <buttonCell key="cell" type="push" title="^IDS_BROWSER_HANGMONITOR_RENDERER_END" bezelStyle="rounded" alignment="center" state="on" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="13">
+                                <buttonCell key="cell" type="push" bezelStyle="rounded" alignment="center" state="on" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="13">
                                     <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                     <font key="font" metaFont="system"/>
                                 </buttonCell>

chrome/browser/ui/cocoa/hung_renderer_controller.mm

@@ -133,6 +133,8 @@ class HungRendererWebContentsObserverBridge
   [messageView_ setStringValue:
       l10n_util::GetPluralNSStringF(IDS_BROWSER_HANGMONITOR_RENDERER,
                                     count)];
+  [killButton_ setTitle:l10n_util::GetPluralNSStringF(
+                            IDS_BROWSER_HANGMONITOR_RENDERER_END, count)];
 
   // Make the message fit.
   CGFloat messageShift =