Revert 51042 - Show a warning message if the cache might not be cleared corre...

chrome/common/extensions/docs/examples/extensions/benchmark/background.html

Index: chrome/common/extensions/docs/examples/extensions/benchmark/background.html
===================================================================
--- chrome/common/extensions/docs/examples/extensions/benchmark/background.html	(revision 51045)
+++ chrome/common/extensions/docs/examples/extensions/benchmark/background.html	(working copy)
@@ -322,20 +322,6 @@
 });
 
 function run() {
-  if (window.clearCache) {
-    // Show a warning if we will try to clear the cache between runs
-    // but will also be reusing the same WebKit instance (i.e. Chrome
-    // is in single-process mode, or 'Use New Tabs' is turned off)
-    // because the WebKit cache might not get completely cleared between runs.
-    if (chrome.benchmarking.isSingleProcess()) {
-      alert("Warning: the WebKit cache may not be cleared correctly " +
-            "between runs because Chrome is running in single-process mode.");
-    } else if (!window.useNewTabs) {
-      alert("Warning: the WebKit cache may not be cleared correctly " +
-            "between runs because 'Use New Tabs Per Page' is turned off.");
-    }
-  }
-
   var urls = testUrl.split(",");
   for (var i = 0; i < urls.length; i++) {
     var benchmark = new Benchmark();