[Mac] Added (disabled) UI for extensions sync on OS X.

chrome/app/nibs/SyncCustomize.xib

Index: chrome/app/nibs/SyncCustomize.xib
diff --git a/chrome/app/nibs/SyncCustomize.xib b/chrome/app/nibs/SyncCustomize.xib
index 894fb0b30335ab1b496b9d84b1a4976cc6e5dce8..188c7153f9a0f83b7e7b3908e433745461c74581 100644
--- a/chrome/app/nibs/SyncCustomize.xib
+++ b/chrome/app/nibs/SyncCustomize.xib
@@ -159,6 +159,28 @@
 								<int key="NSPeriodicInterval">25</int>
 							</object>
 						</object>
+						<object class="NSButton" id="430596235">
+							<reference key="NSNextResponder" ref="925353020"/>
+							<int key="NSvFlags">292</int>
+							<string key="NSFrame">{{26, 59}, {251, 18}}</string>
+							<reference key="NSSuperview" ref="925353020"/>
+							<bool key="NSEnabled">YES</bool>
+							<object class="NSButtonCell" key="NSCell" id="237072256">
+								<int key="NSCellFlags">604110336</int>
+								<int key="NSCellFlags2">0</int>
+								<string key="NSContents">^IDS_SYNC_DATATYPE_EXTENSIONS</string>
+								<reference key="NSSupport" ref="460135184"/>
+								<reference key="NSControlView" ref="430596235"/>
+								<int key="NSButtonFlags">1211912703</int>
+								<int key="NSButtonFlags2">2</int>
+								<reference key="NSNormalImage" ref="817906260"/>
+								<reference key="NSAlternateImage" ref="165114022"/>
+								<string key="NSAlternateContents"/>
+								<string key="NSKeyEquivalent"/>
+								<int key="NSPeriodicDelay">200</int>
+								<int key="NSPeriodicInterval">25</int>
+							</object>
+						</object>
 						<object class="NSButton" id="425937350">
 							<reference key="NSNextResponder" ref="925353020"/>
 							<int key="NSvFlags">292</int>
@@ -459,6 +481,42 @@
 					</object>
 					<int key="connectionID">149</int>
 				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBBindingConnection" key="connection">
+						<string key="label">value: extensionsPreferred</string>
+						<reference key="source" ref="430596235"/>
+						<reference key="destination" ref="1001"/>
+						<object class="NSNibBindingConnector" key="connector">
+							<reference key="NSSource" ref="430596235"/>
+							<reference key="NSDestination" ref="1001"/>
+							<string key="NSLabel">value: extensionsPreferred</string>
+							<string key="NSBinding">value</string>
+							<string key="NSKeyPath">extensionsPreferred</string>
+							<object class="NSDictionary" key="NSOptions">
+								<string key="NS.key.0">NSAllowsEditingMultipleValuesSelection</string>
+								<reference key="NS.object.0" ref="6"/>
+							</object>
+							<int key="NSNibBindingConnectorVersion">2</int>
+						</object>
+					</object>
+					<int key="connectionID">163</int>
+				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBBindingConnection" key="connection">
+						<string key="label">enabled: extensionsRegistered</string>
+						<reference key="source" ref="430596235"/>
+						<reference key="destination" ref="1001"/>
+						<object class="NSNibBindingConnector" key="connector">
+							<reference key="NSSource" ref="430596235"/>
+							<reference key="NSDestination" ref="1001"/>
+							<string key="NSLabel">enabled: extensionsRegistered</string>
+							<string key="NSBinding">enabled</string>
+							<string key="NSKeyPath">extensionsRegistered</string>
+							<int key="NSNibBindingConnectorVersion">2</int>
+						</object>
+					</object>
+					<int key="connectionID">166</int>
+				</object>
 			</object>
 			<object class="IBMutableOrderedSet" key="objectRecords">
 				<object class="NSArray" key="orderedObjects">
@@ -519,6 +577,7 @@
 							<reference ref="515710968"/>
 							<reference ref="425937350"/>
 							<reference ref="903818124"/>
+							<reference ref="430596235"/>
 						</object>
 						<reference key="parent" ref="114461420"/>
 					</object>
@@ -635,6 +694,20 @@
 						<reference key="object" ref="683407897"/>
 						<reference key="parent" ref="903818124"/>
 					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">156</int>
+						<reference key="object" ref="430596235"/>
+						<object class="NSMutableArray" key="children">
+							<bool key="EncodedWithXMLCoder">YES</bool>
+							<reference ref="237072256"/>
+						</object>
+						<reference key="parent" ref="925353020"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">157</int>
+						<reference key="object" ref="237072256"/>
+						<reference key="parent" ref="430596235"/>
+					</object>
 				</object>
 			</object>
 			<object class="NSMutableDictionary" key="flattenedProperties">
@@ -650,6 +723,8 @@
 					<string>107.IBPluginDependency</string>
 					<string>108.IBPluginDependency</string>
 					<string>109.IBPluginDependency</string>
+					<string>156.IBPluginDependency</string>
+					<string>157.IBPluginDependency</string>
 					<string>49.IBEditorWindowLastContentRect</string>
 					<string>49.IBPluginDependency</string>
 					<string>49.IBWindowTemplateEditedContentRect</string>
@@ -676,9 +751,11 @@
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{782, 863}, {327, 207}}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{782, 863}, {327, 207}}</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>{{832, 795}, {327, 207}}</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>{{832, 795}, {327, 207}}</string>
 					<reference ref="6"/>
 					<string>{196, 240}</string>
 					<string>{{357, 418}, {480, 270}}</string>
@@ -712,7 +789,7 @@
 				</object>
 			</object>
 			<nil key="sourceID"/>
-			<int key="maxID">155</int>
+			<int key="maxID">166</int>
 		</object>
 		<object class="IBClassDescriber" key="IBDocument.Classes">
 			<object class="NSMutableArray" key="referencedPartialClassDescriptions">
@@ -802,6 +879,13 @@
 					<string key="className">NSObject</string>
 					<object class="IBClassDescriptionSource" key="sourceIdentifier">
 						<string key="majorKey">IBProjectSource</string>
+						<string key="minorKey">browser/cocoa/objc_zombie.h</string>
+					</object>
+				</object>
+				<object class="IBPartialClassDescription">
+					<string key="className">NSObject</string>
+					<object class="IBClassDescriptionSource" key="sourceIdentifier">
+						<string key="majorKey">IBProjectSource</string>
 						<string key="minorKey">browser/cocoa/status_bubble_mac.h</string>
 					</object>
 				</object>