Adjust test thresholds for OSX 10.11

third_party/WebKit/LayoutTests/webaudio/constructor/periodicwave.html

Index: third_party/WebKit/LayoutTests/webaudio/constructor/periodicwave.html
diff --git a/third_party/WebKit/LayoutTests/webaudio/constructor/periodicwave.html b/third_party/WebKit/LayoutTests/webaudio/constructor/periodicwave.html
index 779fa9688119d04efabf21f08b23e4a27370bc85..9b89c34adea2908a94e0e07de099ea413a0b9e1e 100644
--- a/third_party/WebKit/LayoutTests/webaudio/constructor/periodicwave.html
+++ b/third_party/WebKit/LayoutTests/webaudio/constructor/periodicwave.html
@@ -116,7 +116,7 @@
             }
             return expected;
           },
-          2.7106e-5).then(taskDone);
+          2.7143e-5).then(taskDone);
       });
 
       audit.defineTask("2: real periodicwave test", function (taskDone) {
@@ -131,7 +131,7 @@
             }
             return expected;
           },
-          2.7106e-5).then(taskDone);
+          2.7143e-5).then(taskDone);
       }),
 
       audit.defineTask("3: real periodicwave test", function (taskDone) {
@@ -147,7 +147,7 @@
           }
           return expected;
         },
-        5.4211e-5).then(taskDone);
+        5.4285e-5).then(taskDone);
       });
 
       audit.defineTask("1: imag periodicwave test", function (taskDone) {