Add a command line flag to specify the minimum flash version implementing the NPP_ClearSiteData API.

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 0365ccc1b40e8024da95c856174346f1961ed26d..21a18b98f4061ea1da866d7968bad96d4acb5fd0 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -811,6 +811,9 @@ const char kMessageLoopHistogrammer[]       = "message-loop-histogrammer";
 // and performance tests.
 const char kMetricsRecordingOnly[]          = "metrics-recording-only";
 
+// The minimum version of Flash that implements the NPP_ClearSiteData API.
+const char kMinClearSiteDataFlashVersion[]  = "min-clearsitedata-flash-version";
+
 // Sets the default IP address (interface) for the stub (normally 127.0.0.1).
 const char kNaClDebugIP[]                   = "nacl-debug-ip";