Remove setTimeout for serviceNextCopyTaskEntry_().

FileCopyManager.serviceNextCopyTaskEntry_() already works in asynchronous way,
so it shouldn't be necessary to run it with setTimeout().

BUG=246976
TEST=Ran browser_tests --gtest_filter="*FileSystemExtensionApiTest*:*FileManagerBrowserTest*".

Review URL: https://chromiumcodereview.appspot.com/19818005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@213388 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/file_manager/js/file_copy_manager.js

@@ -746,12 +746,7 @@ FileCopyManager.prototype.serviceCopyTask_ = function(
     }
 
     self.sendProgressEvent_('PROGRESS');
-
-    // We yield a few ms between copies to give the browser a chance to service
-    // events (like perhaps the user clicking to cancel the copy, for example).
-    setTimeout(function() {
-      self.serviceNextCopyTaskEntry_(task, onEntryServiced, errorCallback);
-    }, 10);
+    self.serviceNextCopyTaskEntry_(task, onEntryServiced, errorCallback);
   };
 
   this.serviceNextCopyTaskEntry_(task, onEntryServiced, errorCallback);