Delete old (pre-MD) download shelf view code.

chrome/app/nibs/DownloadShelf.xib

 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="5056" systemVersion="13F1077" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none">
     <dependencies>
         <deployment version="1090" identifier="macosx"/>
         <development version="5100" identifier="xcode"/>
         <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="5056"/>
     </dependencies>
     <objects>
         <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
         <customObject id="-3" userLabel="Application"/>
@@ skipping 35 matching lines @@
                     <color key="borderColor" white="0.0" alpha="0.41999999999999998" colorSpace="calibratedWhite"/>
                     <color key="fillColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
                 </box>
                 <customView id="31" customClass="GTMWidthBasedTweaker">
                     <rect key="frame" x="261" y="0.0" width="219" height="44"/>
                     <autoresizingMask key="autoresizingMask" flexibleMinX="YES"/>
                     <subviews>
                         <button id="24" customClass="DownloadShowAllButton">
                             <rect key="frame" x="2" y="6" width="189" height="34"/>
                             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES"/>
-                            <buttonCell key="cell" type="square" title="^IDS_SHOW_ALL" bezelStyle="shadowlessSquare" imagePosition="left" alignment="center" imageScaling="proportionallyDown" inset="2" id="25" customClass="DownloadShowAllCell">
+                            <buttonCell key="cell" type="square" title="^IDS_SHOW_ALL_DOWNLOADS" bezelStyle="shadowlessSquare" imagePosition="left" alignment="center" imageScaling="proportionallyDown" inset="2" id="25" customClass="DownloadShowAllCell">
                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                 <font key="font" metaFont="system"/>
                             </buttonCell>
                             <connections>
                                 <action selector="showDownloadsTab:" target="-2" id="27"/>
                             </connections>
                         </button>
                     </subviews>
                     <connections>
                         <outlet property="viewToSlideAndResize_" destination="36" id="38"/>
                     </connections>
                 </customView>
             </subviews>
             <connections>
                 <outlet property="delegate_" destination="-2" id="23"/>
             </connections>
         </customView>
         <customObject id="28" customClass="ChromeUILocalizer"/>
         <customObject id="29" customClass="GTMUILocalizerAndLayoutTweaker">
             <connections>
                 <outlet property="localizer_" destination="28" id="30"/>
                 <outlet property="uiObject_" destination="31" id="35"/>
             </connections>
         </customObject>
     </objects>
 </document>