Extract InterceptorData from JavaScriptBackend.

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

Index: pkg/compiler/lib/src/ssa/codegen_helpers.dart
diff --git a/pkg/compiler/lib/src/ssa/codegen_helpers.dart b/pkg/compiler/lib/src/ssa/codegen_helpers.dart
index bf042e4c607e663b9c6ed6154bb2b43e14650c8b..71ade2c62aa5ca9343de4a470351d3cf9327880e 100644
--- a/pkg/compiler/lib/src/ssa/codegen_helpers.dart
+++ b/pkg/compiler/lib/src/ssa/codegen_helpers.dart
@@ -142,8 +142,8 @@ class SsaInstructionSelection extends HBaseVisitor {
     HInstruction receiverArgument = node.inputs[1];
 
     if (interceptor.nonCheck() == receiverArgument.nonCheck()) {
-      if (backend.isInterceptedSelector(selector) &&
-          !backend.isInterceptedMixinSelector(selector, mask)) {
+      if (backend.interceptorData.isInterceptedSelector(selector) &&
+          !backend.interceptorData.isInterceptedMixinSelector(selector, mask)) {
         ConstantValue constant = new SyntheticConstantValue(
             SyntheticConstantKind.DUMMY_INTERCEPTOR,
             receiverArgument.instructionType);