Add a flag to override unlimitedStorage quota for any origins.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 6f007df5f66ad5d4ae36d2fe4ce6b7048d959380..c26dc47ef87c0a953495e3648d2f8d51daea317f 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1390,6 +1390,10 @@ const char kTryChromeAgain[]                = "try-chrome-again";
 // Runs un-installation steps that were done by chrome first-run.
 const char kUninstall[]                     = "uninstall";
 
+// Overrides per-origin quota settings to unlimited storage for any
+// apps/origins.  This should be used only for testing purpose.
+const char kUnlimitedStorage[]              = "unlimited-storage";
+
 // Uses Spdy for the transport protocol instead of HTTP. This is a temporary
 // testing flag.
 const char kUseSpdy[]                       = "use-spdy";