Add flag for zip archiver on files app.

chrome/browser/flag_descriptions.h

Index: chrome/browser/flag_descriptions.h
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index e88d32eeb579a346676277a1165cf3d6b6a8e44d..b4c1d4fa522dee18326ba26fc56cd7c66863496c 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -2464,6 +2464,12 @@ extern const char kEnableTouchSupportForScreenMagnifierName[];
 // Description of the touch support for screen magnifier flag.
 extern const char kEnableTouchSupportForScreenMagnifierDescription[];
 
+// Name of zip archiver on files app.

[yawano, 2017/04/06 11:22:13]

small nit: "Name of zip archiver on files app flag." to make consistent with
other comments. Same with the comment of description.

+extern const char kEnableZipArchiverOnFileManagerName[];
+
+// Description of zip archiver on files app.
+extern const char kEnableZipArchiverOnFileManagerDescription[];
+
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_ANDROID)