Move sandbox code in content to content namespace.

content/common/sandbox_mac_diraccess_unittest.mm

Index: content/common/sandbox_mac_diraccess_unittest.mm
===================================================================
--- content/common/sandbox_mac_diraccess_unittest.mm	(revision 163460)
+++ content/common/sandbox_mac_diraccess_unittest.mm	(working copy)
@@ -25,9 +25,9 @@
 
 }  // namespace
 
-// Tests need to be in the same namespace as the sandbox::Sandbox class to be
-// useable with FRIEND_TEST() declaration.
-namespace sandbox {
+// Tests need to be in the same namespace as the Sandbox class to be useable
+// with FRIEND_TEST() declaration.
+namespace content {
 
 class MacDirAccessSandboxTest : public base::MultiProcessTest {
  public:
@@ -305,4 +305,4 @@
   return 0;
 }
 
-}  // namespace sandbox
+}  // namespace content