Truncate long extension titles for webstore installs.

XIB change:
* Sets the header field to be truncated rather than wrapped.

BUG=417317
TEST=as in bug

Review URL: https://codereview.chromium.org/605463002

Cr-Commit-Position: refs/heads/master@{#296714}

chrome/app/nibs/ExtensionInstallPromptWebstoreData.xib

@@ -2,13 +2,13 @@
 <archive type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="7.10">
 	<data>
 		<int key="IBDocument.SystemTarget">1050</int>
-		<string key="IBDocument.SystemVersion">12C54</string>
-		<string key="IBDocument.InterfaceBuilderVersion">2549</string>
-		<string key="IBDocument.AppKitVersion">1187.34</string>
-		<string key="IBDocument.HIToolboxVersion">625.00</string>
+		<string key="IBDocument.SystemVersion">12F45</string>
+		<string key="IBDocument.InterfaceBuilderVersion">3084</string>
+		<string key="IBDocument.AppKitVersion">1187.40</string>
+		<string key="IBDocument.HIToolboxVersion">626.00</string>
 		<object class="NSMutableDictionary" key="IBDocument.PluginVersions">
 			<string key="NS.key.0">com.apple.InterfaceBuilder.CocoaPlugin</string>
-			<string key="NS.object.0">2549</string>
+			<string key="NS.object.0">3084</string>
 		</object>
 		<object class="NSArray" key="IBDocument.IntegratedClassDependencies">
 			<bool key="EncodedWithXMLCoder">YES</bool>
@@ -435,8 +435,8 @@ ARcABAAAAAEAAAACARwAAwAAAAEAAQAAAVIAAwAAAAEAAQAAAVMAAwAAAAIAAQABAAAAAA</bytes>
 						<reference key="NSNextKeyView" ref="1019866569"/>
 						<bool key="NSEnabled">YES</bool>
 						<object class="NSTextFieldCell" key="NSCell" id="765561203">
-							<int key="NSCellFlags">67108864</int>
-							<int key="NSCellFlags2">272629760</int>
+							<int key="NSCellFlags">67108928</int>
+							<int key="NSCellFlags2">272631808</int>
 							<string key="NSContents">Title</string>
 							<object class="NSFont" key="NSSupport">
 								<string key="NSName">LucidaGrande</string>
@@ -1185,6 +1185,10 @@ ARcABAAAAAEAAAACARwAAwAAAAEAAQAAAVIAAwAAAAEAAQAAAVMAAwAAAAIAAQABAAAAAA</bytes>
 			<string key="NS.key.0">com.apple.InterfaceBuilder.CocoaPlugin.macosx</string>
 			<integer value="1050" key="NS.object.0"/>
 		</object>
+		<object class="NSMutableDictionary" key="IBDocument.PluginDeclaredDependencyDefaults">
+			<string key="NS.key.0">com.apple.InterfaceBuilder.CocoaPlugin.macosx</string>
+			<real value="1060" key="NS.object.0"/>
+		</object>
 		<object class="NSMutableDictionary" key="IBDocument.PluginDeclaredDevelopmentDependencies">
 			<string key="NS.key.0">com.apple.InterfaceBuilder.CocoaPlugin.InterfaceBuilder3</string>
 			<integer value="3000" key="NS.object.0"/>