Bug 908995 - Part 4: Add build flags for TaskTracer. r=khuey.

configure.in

@@ -7435,6 +7435,18 @@ if test -n "$MOZ_VISUAL_EVENT_TRACER"; then
     AC_DEFINE(MOZ_VISUAL_EVENT_TRACER)
 fi
 
+dnl ========================================================
+dnl = Enable TaskTracer
+dnl ========================================================
+MOZ_ARG_ENABLE_BOOL(tasktracer,
+[  --enable-tasktracer       Set compile flags necessary for using TaskTracer],
+    MOZ_TASK_TRACER=1,
+    MOZ_TASK_TRACER= )
+if test "$MOZ_WIDGET_TOOLKIT" = "gonk" -a -n "$MOZ_TASK_TRACER"; then
+    AC_DEFINE(MOZ_TASK_TRACER)
+    AC_SUBST(MOZ_TASK_TRACER)
+fi
+
 dnl ========================================================
 dnl Turn on reflow counting
 dnl ========================================================