Add a policy to disable proceeding through the Safe Browsing interstitials.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 7adedc81cbad32e991f9bf4d2e385e0ecc0f55e9..b64d193163854abbd94ed51b52d9d0242ccb2e8d 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -321,6 +321,11 @@ const char kSafeBrowsingEnabled[] = "safebrowsing.enabled";
 const char kSafeBrowsingReportingEnabled[] =
     "safebrowsing.reporting_enabled";
 
+// Boolean that is true when the SafeBrowsing interstitial should not allow
+// users to proceed anyway.
+const char kSafeBrowsingProceedAnywayDisabled[] =
+    "safebrowsing.proceed_anyway_disabled";
+
 // Enum that specifies whether Incognito mode is:
 // 0 - Enabled. Default behaviour. Default mode is available on demand.
 // 1 - Disabled. Used cannot browse pages in Incognito mode.