Restructure pkg/unittest and pkg/webdriver to follow the pub conventions.

pkg/unittest/lib/src/core_matchers.dart

Index: pkg/unittest/lib/src/core_matchers.dart
===================================================================
--- pkg/unittest/lib/src/core_matchers.dart	(revision 0)
+++ pkg/unittest/lib/src/core_matchers.dart	(working copy)
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-part of unittest;
+part of matcher;
 
 /**
  * Returns a matcher that matches empty strings, maps or collections.
@@ -284,7 +284,7 @@
     if (item is Future) {
       // Queue up an asynchronous expectation that validates when the future
       // completes.
-      item.onComplete(expectAsync1((future) {
+      item.onComplete(wrapAsync((future) {
         if (future.hasValue) {
           expect(false, isTrue, reason:
               "Expected future to fail, but succeeded with '${future.value}'.");
@@ -453,16 +453,16 @@
   bool matches(item, MatchState matchState) => item is IllegalJSRegExpException;
 }
 
-/** A matcher for IndexOutOfRangeExceptions. */
-const isIndexOutOfRangeException = const _IndexOutOfRangeException();
+/** A matcher for RangeErrors. */
+const isRangeError = const _RangeError();
 
-/** A matcher for functions that throw IndexOutOfRangeException. */
-const Matcher throwsIndexOutOfRangeException =
-    const Throws(isIndexOutOfRangeException);
+/** A matcher for functions that throw RangeError. */
+const Matcher throwsRangeError =
+    const Throws(isRangeError);
 
-class _IndexOutOfRangeException extends TypeMatcher {
-  const _IndexOutOfRangeException() : super("IndexOutOfRangeException");
-  bool matches(item, MatchState matchState) => item is IndexOutOfRangeException;
+class _RangeError extends TypeMatcher {
+  const _RangeError() : super("RangeError");
+  bool matches(item, MatchState matchState) => item is RangeError;
 }
 
 /** A matcher for NoSuchMethodErrors. */