Remove EnableMemoryInfo WebSetting, rename internal to preciseMemoryInfoEnabled

PerformanceTests/resources/runner.js

 // There are tests for computeStatistics() located in LayoutTests/fast/harness/perftests
 
-// We need access to console.memory for the memory measurements
+// Require non-quantized real-time JS heap size information.
 if (window.internals)
-    internals.settings.setMemoryInfoEnabled(true);
+    internals.settings.setPreciseMemoryInfoEnabled(true);
 
 if (window.testRunner) {
     testRunner.waitUntilDone();
     testRunner.dumpAsText();
 }
 
 (function () {
     var logLines = null;
     var completedIterations = -1;
     var callsPerIteration = 1;
@@ skipping 317 matching lines @@
 
             iframe.contentDocument.close();
             document.body.removeChild(iframe);
         };
 
         PerfTestRunner.measureTime(test);
     }
 
     window.PerfTestRunner = PerfTestRunner;
 })();