Small changes to get the compilation size of code importing dart:html shorter.

lib/compiler/implementation/ssa/codegen.dart

 // 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.
 
 class SsaCodeGeneratorTask extends CompilerTask {
   final JavaScriptBackend backend;
   SsaCodeGeneratorTask(JavaScriptBackend backend)
       : this.backend = backend,
         super(backend.compiler);
   String get name => 'SSA code generator';
@@ skipping 2029 matching lines @@
       }
       if (name == const SourceString('removeLast') && arity == 0) {
         return 'pop';
       }
     } else if (receiver.isString(types) && isCall) {
       if (name == const SourceString('concat') &&
           arity == 1 &&
           interceptor.inputs[2].isString(types)) {
         return '+';
       }
+      if (name == const SourceString('split') &&
+          arity == 1 &&
+          interceptor.inputs[2].isString(types)) {
+        return 'split';
+      }
     }
 
     return null;
   }
 
   void visitInvokeInterceptor(HInvokeInterceptor node) {
     String builtin = builtinJsName(node);
     if (builtin !== null) {
       if (builtin == '+') {
         use(node.inputs[1]);
@@ skipping 848 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }