Moved most of html lib generating scripts into tools.

sdk/lib/html/templates/html/dart2js/impl_WorkerContext.darttemplate

Index: sdk/lib/html/templates/html/dart2js/impl_WorkerContext.darttemplate
diff --git a/sdk/lib/html/templates/html/dart2js/impl_WorkerContext.darttemplate b/sdk/lib/html/templates/html/dart2js/impl_WorkerContext.darttemplate
deleted file mode 100644
index 62b1693cba90ff568c98dee0033d62213bb8e47d..0000000000000000000000000000000000000000
--- a/sdk/lib/html/templates/html/dart2js/impl_WorkerContext.darttemplate
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// 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 html;
-
-/// @domName $DOMNAME
-class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
-$!MEMBERS
-
-  /**
-   * Gets an instance of the Indexed DB factory to being using Indexed DB.
-   *
-   * Use [IdbFactory.supported] to check if Indexed DB is supported on the
-   * current platform.
-   */
-  @SupportedBrowser(SupportedBrowser.CHROME, '23.0')
-  @SupportedBrowser(SupportedBrowser.FIREFOX, '15.0')
-  @SupportedBrowser(SupportedBrowser.IE, '10.0')
-  @Experimental()
-  IdbFactory get indexedDB =>
-      JS('IdbFactory',
-         '#.indexedDB || #.webkitIndexedDB || #.mozIndexedDB',
-         this, this, this);
-}