Fix some grammar in the ppapi_crash.html test

ppapi/native_client/tests/ppapi_browser/crash/ppapi_crash.html

Index: ppapi/native_client/tests/ppapi_browser/crash/ppapi_crash.html
diff --git a/ppapi/native_client/tests/ppapi_browser/crash/ppapi_crash.html b/ppapi/native_client/tests/ppapi_browser/crash/ppapi_crash.html
index c7df1607f8beab40a1524b4b793159776d59cb7a..1c4eadca9c23e56296b080a930877300b429e7fc 100644
--- a/ppapi/native_client/tests/ppapi_browser/crash/ppapi_crash.html
+++ b/ppapi/native_client/tests/ppapi_browser/crash/ppapi_crash.html
@@ -44,7 +44,7 @@
                            function(e) { test.fail(); });
           plugin.postMessage(testName);
           // In case the nexe does not crash right away, we will ping it
-          // until we detect that it's death. DidChangeView and other events
+          // until we detect that it's dead. DidChangeView and other events
           // can do this too, but are less reliable.
           if (pingToDetectCrash) {
             function PingBack(message) {