Remove functions white-listed for use of try-finally and switch, add JS_SET_CURRENT_ISOLATE.

pkg/compiler/lib/src/js_backend/codegen/task.dart

 // Copyright (c) 2014, 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.
 
 /// Generate code using the cps-based IR pipeline.
 library code_generator_task;
 
 import 'glue.dart';
 import 'codegen.dart';
 import 'unsugar.dart';
@@ skipping 54 matching lines @@
         ClassElement cls = element.enclosingClass;
         String name = element.name;
         String className = cls == null ? null : cls.name;
         LibraryElement library = element.library;
         String libraryName = library == null ? null : library.toString();
         // TODO(karlklose): remove this fallback.
         // Fallback for a few functions that we know require try-finally and
         // switch.
         if (element.isNative ||
             element.isPatched ||
-            libraryName == 'origin library(dart:typed_data)' ||
-            // Using switch or try-finally.
-            library.isInternalLibrary && name == 'unwrapException' ||
-            library.isPlatformLibrary && className == 'IterableBase' ||
-            library.isInternalLibrary && className == 'Closure' ||
-            libraryName == 'origin library(dart:collection)' &&
-               name == 'mapToString' ||
-            libraryName == 'library(dart:html)' && name == 'sanitizeNode' ||
-            className == '_IsolateContext' ||
-            className == 'IsolateNatives' ||
-            className == '_Deserializer' ||
-            name == '_rootRun' ||
-            name == '_microtaskLoopEntry') {
+            libraryName == 'origin library(dart:typed_data)') {
           compiler.log('Using SSA compiler for platform element $element');
           return fallbackCompiler.compile(work);
         }
 
         if (tracer != null) {
           tracer.traceCompilation(element.name, null);
         }
         cps.FunctionDefinition cpsFunction = compileToCpsIR(element);
         cpsFunction = optimizeCpsIR(cpsFunction);
         tree_ir.FunctionDefinition treeFunction = compileToTreeIR(cpsFunction);
@@ skipping 136 matching lines @@
     // TODO(sigurdm): Make a better list of tasks.
     return <CompilerTask>[irBuilderTask]..addAll(fallbackCompiler.tasks);
   }
 
   js.Node attachPosition(js.Node node, AstElement element) {
     return node.withSourceInformation(
         sourceInformationFactory.createBuilderForContext(element)
             .buildDeclaration(element));
   }
 }