Exit the installer gracefully if the processor doesn't support SSE2.

chrome/installer/setup/setup_util.cc

Index: chrome/installer/setup/setup_util.cc
diff --git a/chrome/installer/setup/setup_util.cc b/chrome/installer/setup/setup_util.cc
index d21abf97bd2346c222e2da73cc2d007b6fd668c8..010f21dc7857d0109e71d9bd7d4d54f366a2cc41 100644
--- a/chrome/installer/setup/setup_util.cc
+++ b/chrome/installer/setup/setup_util.cc
@@ -9,6 +9,7 @@
 #include <windows.h>
 
 #include "base/command_line.h"
+#include "base/cpu.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
@@ -449,6 +450,10 @@ bool ContainsUnsupportedSwitch(const CommandLine& cmd_line) {
   return false;
 }
 
+bool IsProcessorSupported() {
+  return base::CPU::CPU().has_sse2();
+}
+

[cpu_(ooo_6.6-7.5), 2014/03/12 17:15:11]

I think 
return base::CPU().has_sse2(); 

works, in fact I am not even sure why the compiler is happy with your code.

[grt (UTC plus 2), 2014/03/12 18:24:01]

woah. i didn't even realize i duplicated it. yikes. Done.

 ScopedTokenPrivilege::ScopedTokenPrivilege(const wchar_t* privilege_name)
     : is_enabled_(false) {
   HANDLE temp_handle;