Remove --pnacl-dir override flag.

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 e3e95223db6b3720d36285b0710e4fb203285e0f..98f81cd58a6f2d55c035fadc7361f3976b2a5fac 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1130,9 +1130,6 @@ const char kPerformanceMonitorGathering[]   = "performance-monitor-gathering";
 // See kRecordMode.
 const char kPlaybackMode[]                  = "playback-mode";
 
-// Overrides the path to the location that PNaCl is installed.
-const char kPnaclDir[]                      = "pnacl-dir";
-
 // Use the PPAPI (Pepper) Flash found at the given path.
 const char kPpapiFlashPath[]                = "ppapi-flash-path";