[WebViewLayoutTest] Fix potential rounding error in testBatteryApi() layout test.

android_webview/tools/WebViewShell/test/blink-apis/battery-status/battery-callback.html

Index: android_webview/tools/WebViewShell/test/blink-apis/battery-status/battery-callback.html
diff --git a/android_webview/tools/WebViewShell/test/blink-apis/battery-status/battery-callback.html b/android_webview/tools/WebViewShell/test/blink-apis/battery-status/battery-callback.html
index 42f2ec39240549835fdd1529ae38ed97e57ab112..fd9a2e17ac0637ec3df442aee41896c7853310a1 100644
--- a/android_webview/tools/WebViewShell/test/blink-apis/battery-status/battery-callback.html
+++ b/android_webview/tools/WebViewShell/test/blink-apis/battery-status/battery-callback.html
@@ -6,13 +6,6 @@
       description("Test Battery Status API callback in WebView");
       window.jsTestIsAsync = true;
 
-      function isInteger(value) {
-        if ((undefined === value) || (null === value)) {
-          return false;
-        }
-        return value % 1 == 0;
-      }
-
       var battery;
       function batteryStatusSuccess(batteryManager) {
         debug('batteryStatusSuccess invoked');
@@ -22,7 +15,7 @@
         shouldBeGreaterThanOrEqual('battery.level', '0');
         shouldBeLessThanOrEqual('battery.level', '1');
         // Check that level has at most 2 significant digits
-        shouldBeTrue('isInteger(battery.level * 100)');
+        shouldBeTrue('battery.level.toPrecision(2) == battery.level');
         shouldBeTrue('!battery.charging || battery.dischargingTime === Infinity');
         shouldBeTrue('battery.charging || battery.chargingTime === Infinity');
         finishJSTest();
@@ -36,4 +29,4 @@
       navigator.getBattery().then(batteryStatusSuccess, batteryStatusFailure);
     </script>
   </body>
-</html>
+</html>