Get rid of unnecessary chrome_main_ files now that most of the code has been removed from them. I...

chrome/app/chrome_main_mac.mm

Index: chrome/app/chrome_main_mac.mm
===================================================================
--- chrome/app/chrome_main_mac.mm	(revision 99456)
+++ chrome/app/chrome_main_mac.mm	(working copy)
@@ -18,8 +18,6 @@
 #include "chrome/common/chrome_paths_internal.h"
 #include "policy/policy_constants.h"
 
-namespace chrome_main {
-
 void CheckUserDataDirPolicy(FilePath* user_data_dir) {
   base::mac::ScopedNSAutoreleasePool pool;
 
@@ -45,5 +43,3 @@
   NSBundle* base_bundle = chrome::OuterAppBundle();
   base::mac::SetBaseBundleID([[base_bundle bundleIdentifier] UTF8String]);
 }
-
-}  // namespace chrome_main