Create a NullErrorReporter to use when errors don't need to be recorded.

pkg/analyzer/test/generated/all_the_rest.dart

Index: pkg/analyzer/test/generated/all_the_rest.dart
diff --git a/pkg/analyzer/test/generated/all_the_rest.dart b/pkg/analyzer/test/generated/all_the_rest.dart
index 50067a4d1468045154dca2c7c9bc19c337087151..d2ca26da421329dceb03f1ce5dd8c8b18aafc4f1 100644
--- a/pkg/analyzer/test/generated/all_the_rest.dart
+++ b/pkg/analyzer/test/generated/all_the_rest.dart
@@ -5655,7 +5655,7 @@ class ConstantVisitorTest extends ResolverTestCase {
         elseExpression);
     GatheringErrorListener errorListener = new GatheringErrorListener();
     ErrorReporter errorReporter =
-        new ErrorReporter(errorListener, _dummySource());
+        new ErrorReporterImpl(errorListener, _dummySource());
     _assertValue(
         0,
         expression.accept(
@@ -5687,7 +5687,7 @@ class ConstantVisitorTest extends ResolverTestCase {
     expression.staticElement = constructorElement;
     GatheringErrorListener errorListener = new GatheringErrorListener();
     ErrorReporter errorReporter =
-        new ErrorReporter(errorListener, _dummySource());
+        new ErrorReporterImpl(errorListener, _dummySource());
     expression.accept(new ConstantVisitor.con1(typeProvider, errorReporter));
     errorListener.assertErrorsWithCodes(
         [CompileTimeErrorCode.INVALID_CONSTANT]);
@@ -5703,7 +5703,7 @@ class ConstantVisitorTest extends ResolverTestCase {
         elseExpression);
     GatheringErrorListener errorListener = new GatheringErrorListener();
     ErrorReporter errorReporter =
-        new ErrorReporter(errorListener, _dummySource());
+        new ErrorReporterImpl(errorListener, _dummySource());
     DartObjectImpl result = expression.accept(
         new ConstantVisitor.con1(new TestTypeProvider(), errorReporter));
     JUnitTestCase.assertNull(result);
@@ -5720,7 +5720,7 @@ class ConstantVisitorTest extends ResolverTestCase {
         elseExpression);
     GatheringErrorListener errorListener = new GatheringErrorListener();
     ErrorReporter errorReporter =
-        new ErrorReporter(errorListener, _dummySource());
+        new ErrorReporterImpl(errorListener, _dummySource());
     DartObjectImpl result = expression.accept(
         new ConstantVisitor.con1(new TestTypeProvider(), errorReporter));
     JUnitTestCase.assertNull(result);
@@ -5737,7 +5737,7 @@ class ConstantVisitorTest extends ResolverTestCase {
         elseExpression);
     GatheringErrorListener errorListener = new GatheringErrorListener();
     ErrorReporter errorReporter =
-        new ErrorReporter(errorListener, _dummySource());
+        new ErrorReporterImpl(errorListener, _dummySource());
     DartObjectImpl result = expression.accept(
         new ConstantVisitor.con1(new TestTypeProvider(), errorReporter));
     JUnitTestCase.assertNull(result);
@@ -5754,7 +5754,7 @@ class ConstantVisitorTest extends ResolverTestCase {
         elseExpression);
     GatheringErrorListener errorListener = new GatheringErrorListener();
     ErrorReporter errorReporter =
-        new ErrorReporter(errorListener, _dummySource());
+        new ErrorReporterImpl(errorListener, _dummySource());
     _assertValue(
         1,
         expression.accept(
@@ -5804,7 +5804,7 @@ class ConstantVisitorTest extends ResolverTestCase {
     Expression expression =
         findTopLevelConstantExpression(compilationUnit, name);
     GatheringErrorListener errorListener = new GatheringErrorListener();
-    ErrorReporter errorReporter = new ErrorReporter(errorListener, source);
+    ErrorReporter errorReporter = new ErrorReporterImpl(errorListener, source);
     DartObjectImpl result = expression.accept(
         new ConstantVisitor.con2(typeProvider, lexicalEnvironment, errorReporter));
     errorListener.assertNoErrors();
@@ -11815,7 +11815,7 @@ class ErrorReporterTest extends EngineTestCase {
   void test_creation() {
     GatheringErrorListener listener = new GatheringErrorListener();
     TestSource source = new TestSource();
-    JUnitTestCase.assertNotNull(new ErrorReporter(listener, source));
+    JUnitTestCase.assertNotNull(new ErrorReporterImpl(listener, source));
   }
 
   void test_reportTypeErrorForNode_differentNames() {
@@ -11823,7 +11823,7 @@ class ErrorReporterTest extends EngineTestCase {
     DartType secondType = createType("/test2.dart", "B");
     GatheringErrorListener listener = new GatheringErrorListener();
     ErrorReporter reporter =
-        new ErrorReporter(listener, firstType.element.source);
+        new ErrorReporterImpl(listener, firstType.element.source);
     reporter.reportTypeErrorForNode(
         StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE,
         AstFactory.identifier3("x"),
@@ -11838,7 +11838,7 @@ class ErrorReporterTest extends EngineTestCase {
     DartType secondType = createType("/test2.dart", typeName);
     GatheringErrorListener listener = new GatheringErrorListener();
     ErrorReporter reporter =
-        new ErrorReporter(listener, firstType.element.source);
+        new ErrorReporterImpl(listener, firstType.element.source);
     reporter.reportTypeErrorForNode(
         StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE,
         AstFactory.identifier3("x"),