Rename blahHandler to onBlah throughout dart:io.

tests/standalone/src/FileInvalidArgumentsTest.dart

Index: tests/standalone/src/FileInvalidArgumentsTest.dart
diff --git a/tests/standalone/src/FileInvalidArgumentsTest.dart b/tests/standalone/src/FileInvalidArgumentsTest.dart
index f956ee3fb42ca317352c2ced456d160853bab950..763b9fd2170407e7a76bd0b0e2581bfc388010a4 100644
--- a/tests/standalone/src/FileInvalidArgumentsTest.dart
+++ b/tests/standalone/src/FileInvalidArgumentsTest.dart
@@ -15,10 +15,10 @@ class FileTest {
       Expect.isTrue(e.toString().contains('open file'));
     }
 
-    file.errorHandler = (s) {
+    file.onError = (s) {
       Expect.isTrue(s.contains('open file'));
     };
-    file.openHandler = () {
+    file.onOpen = () {
       Expect.fail('non-string name open');
     };
     file.open();
@@ -34,10 +34,10 @@ class FileTest {
       Expect.isTrue(e.toString().contains('is not a string'));
     }
 
-    file.errorHandler = (s) {
+    file.onError = (s) {
       Expect.isTrue(s.contains('is not a string'));
     };
-    file.existsHandler = (bool) {
+    file.onExists = (bool) {
       Expect.fail('non-string name exists');
     };
     file.exists();
@@ -53,10 +53,10 @@ class FileTest {
       Expect.isTrue(e.toString().contains('Cannot create file'));
     }
 
-    file.errorHandler = (s) {
+    file.onError = (s) {
       Expect.isTrue(s.contains('Cannot create file'));
     };
-    file.createHandler = (created) {
+    file.onCreate = (created) {
       Expect.fail('non-string name exists');
     };
     file.create();
@@ -74,15 +74,15 @@ class FileTest {
     }
 
     var errors = 0;
-    file.errorHandler = (s) {
+    file.onError = (s) {
       errors++;
       Expect.isTrue(s.contains('Invalid arguments'));
     };
-    file.readListHandler = (bytes) {
+    file.onReadList = (bytes) {
       Expect.fail('read list invalid arguments');
     };
     file.readList(buffer, offset, length);
-    file.closeHandler = () {
+    file.onClose = () {
       Expect.equals(1, errors);
     };
     file.close();
@@ -100,16 +100,16 @@ class FileTest {
     }
 
     var errors = 0;
-    file.errorHandler = (s) {
+    file.onError = (s) {
       errors++;
       Expect.isTrue(s.contains('Invalid argument'));
     };
     var calls = 0;
-    file.noPendingWriteHandler = () {
+    file.onNoPendingWrite = () {
       if (++calls > 1) Expect.fail('write list invalid argument');
     };
     file.writeByte(value);
-    file.closeHandler = () {
+    file.onClose = () {
       Expect.equals(1, errors);
     };
     file.close();
@@ -127,16 +127,16 @@ class FileTest {
     }
 
     var errors = 0;
-    file.errorHandler = (s) {
+    file.onError = (s) {
       errors++;
       Expect.isTrue(s.contains('Invalid arguments'));
     };
     var calls = 0;
-    file.noPendingWriteHandler = () {
+    file.onNoPendingWrite = () {
       if (++calls > 1) Expect.fail('write string invalid argument');
     };
     file.writeList(buffer, offset, bytes);
-    file.closeHandler = () {
+    file.onClose = () {
       Expect.equals(1, errors);
     };
     file.close();
@@ -155,16 +155,16 @@ class FileTest {
     }
 
     var errors = 0;
-    file.errorHandler = (s) {
+    file.onError = (s) {
       errors++;
       Expect.isTrue(s.contains('writeString failed'));
     };
     var calls = 0;
-    file.noPendingWriteHandler = () {
+    file.onNoPendingWrite = () {
       if (++calls > 1) Expect.fail('write list invalid argument');
     };
     file.writeString(string);
-    file.closeHandler = () {
+    file.onClose = () {
       Expect.equals(1, errors);
     };
     file.close();
@@ -180,10 +180,10 @@ class FileTest {
       Expect.isTrue(e.toString().contains('fullPath failed'));
     }
 
-    file.errorHandler = (s) {
+    file.onError = (s) {
       Expect.isTrue(s.contains('fullPath failed'));
     };
-    file.fullPathHandler = (path) {
+    file.onFullPath = (path) {
       Expect.fail('full path invalid argument');
     };
     file.fullPath();