Add an internal flag to the dart2js compiler to enable/diable inlining

lib/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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 993 matching lines @@
     stack.add(localsHandler.readLocal(returnElement));
     returnElement = state.oldReturnElement;
     assert(stack.length == 1);
     state.oldStack.add(stack[0]);
     stack = state.oldStack;
   }
 
   bool tryInlineMethod(Element element,
                        Selector selector,
                        Link<Node> arguments) {
+    if (!compiler.enableInlining) return false;
     // TODO(floitsch): we should be able to inline inside lazy initializers.
     if (!currentElement.isFunction()) return false;
     // TODO(floitsch): we should be able to inline getters, setters and
     // constructor bodies.
     if (!element.isFunction()) return false;
     // TODO(floitsch): find a cleaner way to know if the element is a function
     // containing nodes.
     // [PartialFunctionElement]s are [FunctionElement]s that have [Node]s.
     if (element is !PartialFunctionElement) return false;
     if (inliningStack.length > MAX_INLINING_DEPTH) return false;
@@ skipping 3208 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;
   }
 }