Backed out changeset 1c6223f7c74f (bug 876029) for Android armv6 mochitest-1/3 crahes.

xpcom/base/AvailableMemoryTracker.cpp

@@ -15,7 +15,6 @@
 #include "nsIObserverService.h"
 #include "nsIRunnable.h"
 #include "nsISupports.h"
-#include "nsMemoryPressure.h"
 #include "nsPrintfCString.h"
 #include "nsThread.h"
 
@@ -188,7 +187,7 @@ bool MaybeScheduleMemoryPressureEvent()
   sLastLowMemoryNotificationTime = PR_IntervalNow();
 
   LOG("Scheduling memory pressure notification.");
-  NS_DispatchEventualMemoryPressure(MemPressure_New);
+  ScheduleMemoryPressureEvent();
   return true;
 }
 
@@ -213,7 +212,7 @@ void CheckMemAvailable()
       // so don't worry about firing this notification too often.
       LOG("Detected low virtual memory.");
       PR_ATOMIC_INCREMENT(&sNumLowVirtualMemEvents);
-      NS_DispatchEventualMemoryPressure(MemPressure_New);
+      ScheduleMemoryPressureEvent();
     }
     else if (stat.ullAvailPageFile < sLowCommitSpaceThreshold * 1024 * 1024) {
       LOG("Detected low available page file space.");