Mark executables to be compatible with Windows 8.1

chrome/app/chrome.exe.manifest

 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
 
   <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
     <application>
       <!--The ID below indicates application support for Windows Vista -->
       <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
       <!--The ID below indicates application support for Windows 7 -->
       <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
       <!--The ID below indicates application support for Windows 8 -->
       <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+      <!--The ID below indicates application support for Windows 8.1 -->
+      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
     </application>
   </compatibility>
   
   <dependency>
     <dependentAssembly>
       <assemblyIdentity type="Win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"></assemblyIdentity>
     </dependentAssembly>
   </dependency>
   
   <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
     <security>
       <requestedPrivileges>
         <requestedExecutionLevel level="asInvoker" />
       </requestedPrivileges>
     </security>
   </trustInfo>
   
 </assembly>