Short-circuit failures in BLE js tests

chrome/test/data/extensions/api_test/bluetooth_low_energy/write_characteristic_value/runtest.js

Index: chrome/test/data/extensions/api_test/bluetooth_low_energy/write_characteristic_value/runtest.js
diff --git a/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_characteristic_value/runtest.js b/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_characteristic_value/runtest.js
index 51fd4e96414ad0722a820c0c02c99678a6c5ff4c..f1d0ba0f9e58fcac01262e55115060992945e62e 100644
--- a/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_characteristic_value/runtest.js
+++ b/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_characteristic_value/runtest.js
@@ -32,19 +32,19 @@ valueBytes.set(bytes);
 // 1. Unknown characteristic instanceId.
 writeCharacteristicValue(badCharId, writeValue, function (result) {
   if (result || !chrome.runtime.lastError) {
-    chrome.test.fail('\'badCharId\' did not cause failure');
+    chrome.test.sendMessage('\'badCharId\' did not cause failure');
   }
 
   // 2. Known characteristic instanceId, but call failure.
   writeCharacteristicValue(charId, writeValue, function (result) {
     if (result || !chrome.runtime.lastError) {
-      chrome.test.fail('writeCharacteristicValue should have failed');
+      chrome.test.sendMessage('writeCharacteristicValue should have failed');
     }
 
     // 3. Call should succeed.
     writeCharacteristicValue(charId, writeValue, function (result) {
       if (chrome.runtime.lastError) {
-        chrome.test.fail(chrome.runtime.lastError.message);
+        chrome.test.sendMessage(chrome.runtime.lastError.message);
       }
 
       chrome.bluetoothLowEnergy.getCharacteristic(charId, function (result) {