Make the popup blocker on by default. Flip the flag to be a disabling one.

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 2093c69dfe3d5669028ca281f141323118d7e2ee..5f250e6b4ebe428db22bc3acd5834f2433f80974 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -179,6 +179,11 @@ const char kDisableBackgroundNetworking[] = "disable-background-networking";
 // users with many windows/tabs and lots of memory.
 const char kDisableBackingStoreLimit[]      = "disable-backing-store-limit";
 
+// Disables blocked content warning animation. Currently shows animation for
+// blocked pop-ups only.
+const char kDisableBlockContentAnimation[]  =
+    "disable-blocked-content-animation";
+
 // Disables establishing a backup TCP connection if a specified timeout is
 // exceeded.
 const char kDisableConnectBackupJobs[]      = "disable-connect-backup-jobs";
@@ -415,10 +420,6 @@ const char kEnableAuthNegotiatePort[]       = "enable-auth-negotiate-port";
 // Enables the benchmarking extensions.
 const char kEnableBenchmarking[]            = "enable-benchmarking";
 
-// Enables blocked content warning animation. Currently shows animation for
-// blocked pop-ups only.
-const char kEnableBlockContentAnimation[] = "enable-blocked-content-animation";
-
 // In the browser process this switch is used to enable or disable the
 // client-side phishing detection.  In the renderer this switch is only enabled
 // if this switch is enabled in the browser and the user has opted in to UMA