Extract DiagnosticReporter implementation from Compiler.

pkg/compiler/lib/src/js_emitter/parameter_stub_generator.dart

 // Copyright (c) 2015, 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 dart2js.js_emitter;
 
 class ParameterStubGenerator {
   static final Set<Selector> emptySelectorSet = new Set<Selector>();
 
   final Namer namer;
   final Compiler compiler;
   final JavaScriptBackend backend;
 
   ParameterStubGenerator(this.compiler, this.namer, this.backend);
 
   Emitter get emitter => backend.emitter.emitter;
   CodeEmitterTask get emitterTask => backend.emitter;
+  DiagnosticReporter get reporter => compiler.reporter;
 
   bool needsSuperGetter(FunctionElement element) =>
     compiler.codegenWorld.methodsNeedingSuperGetter.contains(element);
 
   /**
    * Generates stubs to handle invocation of methods with optional
    * arguments.
    *
    * A method like `foo([x])` may be invoked by the following
    * calls: `foo(), foo(1), foo(x: 1)`. This method generates the stub for the
@@ skipping 155 matching lines @@
   // invoked from a subclass. Then we cannot just redirect, since that
   // would invoke the methods of the subclass. We have to compile to:
   // (1) foo$2(a, b) => MyClass.foo$4$c$d.call(this, a, b, null, null)
   // (2) foo$3$c(a, b, c) => MyClass.foo$4$c$d(this, a, b, c, null);
   // (3) foo$3$d(a, b, d) => MyClass.foo$4$c$d(this, a, b, null, d);
   List<ParameterStubMethod> generateParameterStubs(MethodElement member,
                                                    {bool canTearOff: true}) {
     if (member.enclosingElement.isClosure) {
       ClosureClassElement cls = member.enclosingElement;
       if (cls.supertype.element == backend.boundClosureClass) {
-        compiler.internalError(cls.methodElement, 'Bound closure1.');
+        reporter.internalError(cls.methodElement, 'Bound closure1.');
       }
       if (cls.methodElement.isInstanceMember) {
-        compiler.internalError(cls.methodElement, 'Bound closure2.');
+        reporter.internalError(cls.methodElement, 'Bound closure2.');
       }
     }
 
     // The set of selectors that apply to `member`. For example, for
     // a member `foo(x, [y])` the following selectors may apply:
     // `foo(x)`, and `foo(x, y)`.
     Map<Selector, SelectorConstraints> selectors;
     // The set of selectors that apply to `member` if it's name was `call`.
     // This happens when a member is torn off. In that case calls to the
     // function use the name `call`, and we must be able to handle every
@@ skipping 67 matching lines @@
             generateParameterStub(member, selector, null);
         if (stub != null) {
           stubs.add(stub);
         }
       }
     }
 
     return stubs;
   }
 }