Revert r27592, some unit tests fail.

sdk/lib/_internal/compiler/implementation/ssa/builder.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.
 
 part of ssa;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 917 matching lines @@
       this.backend = builder.backend,
       this.work = work,
       graph = new HGraph(),
       stack = new List<HInstruction>(),
       activationVariables = new Map<Element, HLocalValue>(),
       jumpTargets = new Map<TargetElement, JumpHandler>(),
       parameters = new Map<Element, HInstruction>(),
       sourceElementStack = <Element>[work.element],
       inliningStack = <InliningState>[],
       rti = builder.backend.rti,
-      super(work.resolutionTree, builder.compiler) {
+      super(work.resolutionTree) {
     localsHandler = new LocalsHandler(this);
   }
 
   List<InliningState> inliningStack;
 
   Element returnElement;
   DartType returnType;
 
   bool inTryStatement = false;
   int loopNesting = 0;
@@ skipping 2645 matching lines @@
     // Finally, if we called a redirecting factory constructor, check the type.
     if (isRedirected) {
       HInstruction checked = potentiallyCheckType(newInstance, expectedType);
       if (checked != newInstance) {
         pop();
         stack.add(checked);
       }
     }
   }
 
-  visitAssert(node) {
-    if (!compiler.enableUserAssertions) {
-      stack.add(graph.addConstantNull(compiler));
-      return;
-    }
-    visitStaticSend(node);
-  }
-
   visitStaticSend(Send node) {
     Selector selector = elements.getSelector(node);
     Element element = elements[node];
     if (element.isForeign(compiler)) {
       visitForeignSend(node);
       return;
     }
     if (element.isErroneous()) {
       generateThrowNoSuchMethod(node,
                                 getTargetName(element),
                                 argumentNodes: node.arguments);
       return;
     }
+    if (identical(element, compiler.assertMethod)
+        && !compiler.enableUserAssertions) {
+      stack.add(graph.addConstantNull(compiler));
+      return;
+    }
     compiler.ensure(!element.isGenerativeConstructor());
     if (element.isFunction()) {
       var inputs = <HInstruction>[];
       // TODO(5347): Try to avoid the need for calling [implementation] before
       // calling [addStaticSendArgumentsToList].
       bool succeeded = addStaticSendArgumentsToList(selector, node.arguments,
                                                     element.implementation,
                                                     inputs);
       if (!succeeded) {
         generateWrongArgumentCountError(node, element, node.arguments);
@@ skipping 1906 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }