Bug 1152864 - Add DISABLE_UNSAFE_CPOW_WARNINGS environment variable for our test harnesses. r=jimm.

--HG--
extra : rebase_source : f0fe71ebd3e9f7bddad908cbea0eb980ce23c1b2

dom/ipc/ContentParent.cpp

@@ -589,6 +589,10 @@ static nsTArray<PrefSetting>* sNuwaPrefUpdates;
 // case between StartUp() and ShutDown() or JoinAllSubprocesses().
 static bool sCanLaunchSubprocesses;
 
+// Set to true if the DISABLE_UNSAFE_CPOW_WARNINGS environment variable is
+// set.
+static bool sDisableUnsafeCPOWWarnings = false;
+
 // The first content child has ID 1, so the chrome process can have ID 0.
 static uint64_t gContentChildID = 1;
 
@@ -747,6 +751,8 @@ ContentParent::StartUp()
     // Test the PBackground infrastructure on ENABLE_TESTS builds when a special
     // testing preference is set.
     MaybeTestPBackground();
+
+    sDisableUnsafeCPOWWarnings = PR_GetEnv("DISABLE_UNSAFE_CPOW_WARNINGS");
 }
 
 /*static*/ void
@@ -1747,6 +1753,7 @@ ContentParent::OnBeginSyncTransaction() {
     if (XRE_GetProcessType() == GeckoProcessType_Default) {
         nsCOMPtr<nsIConsoleService> console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
         JSContext *cx = nsContentUtils::GetCurrentJSContext();
+        if (!sDisableUnsafeCPOWWarnings) {
             if (console && cx) {
                 nsAutoString filename;
                 uint32_t lineno = 0;
@@ -1760,6 +1767,7 @@ ContentParent::OnBeginSyncTransaction() {
             }
         }
     }
+}
 
 void
 ContentParent::OnChannelConnected(int32_t pid)