Files.app: Add a command-line flag to switch multi-profile support of Files.app.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index c162e94e564252d6daa2fb7534ed667fda337f31..a5dbcc83249b928eddd5112e82e276425ffc2b07 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -128,6 +128,10 @@ const char kFileManagerShowCheckboxes[]     = "file-manager-show-checkboxes";
 const char kFileManagerEnableWebstoreIntegration[] =
     "file-manager-enable-webstore-integration";
 
+// Enables the multi-profile support in the Files.app.
+const char kFileManagerEnableMultiProfile[] =
+    "file-manager-enable-multi-profile";
+
 // Passed to Chrome the first time that it's run after the system boots.
 // Not passed on restart after sign out.
 const char kFirstExecAfterBoot[]            = "first-exec-after-boot";