Merge CommonElements and BackendHelpers!

pkg/compiler/lib/src/ssa/builder_kernel.dart

Index: pkg/compiler/lib/src/ssa/builder_kernel.dart
diff --git a/pkg/compiler/lib/src/ssa/builder_kernel.dart b/pkg/compiler/lib/src/ssa/builder_kernel.dart
index 553f028e76e11b41917f79bb377d5c975e5a7de5..db50aecdbe176ee6d1b29b6922a45e389042b497 100644
--- a/pkg/compiler/lib/src/ssa/builder_kernel.dart
+++ b/pkg/compiler/lib/src/ssa/builder_kernel.dart
@@ -584,7 +584,7 @@ class KernelSsaBuilder extends ir.Visitor with GraphBuilder {
   void visitLoadLibrary(ir.LoadLibrary loadLibrary) {
     // TODO(efortuna): Source information!
     push(new HInvokeStatic(
-        backend.helpers.loadLibraryWrapper,
+        compiler.commonElements.loadLibraryWrapper,
         [
           graph.addConstantString(
               new DartString.literal(loadLibrary.import.name), closedWorld)
@@ -2504,7 +2504,8 @@ class KernelSsaBuilder extends ir.Visitor with GraphBuilder {
     push(new HForeignCode(nativeBehavior.codeTemplate, ssaType, inputs,
         isStatement: !nativeBehavior.codeTemplate.isExpression,
         effects: nativeBehavior.sideEffects,
-        nativeBehavior: nativeBehavior)..sourceInformation = sourceInformation);
+        nativeBehavior: nativeBehavior)
+      ..sourceInformation = sourceInformation);
   }
 
   void handleJsStringConcat(ir.StaticInvocation invocation) {
@@ -2608,9 +2609,8 @@ class KernelSsaBuilder extends ir.Visitor with GraphBuilder {
     _pushDynamicInvocation(
         invocation,
         astAdapter.typeOfInvocation(invocation, closedWorld),
-        <HInstruction>[receiver]
-          ..addAll(
-              _visitArgumentsForDynamicTarget(selector, invocation.arguments)));
+        <HInstruction>[receiver]..addAll(
+            _visitArgumentsForDynamicTarget(selector, invocation.arguments)));
   }
 
   bool _handleEqualsNull(ir.MethodInvocation invocation) {