Make SearchMatch an interface, exclude 'context', move implementation.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 1a99f8fa905819498be3a5fbcdf9c29feeb1cb3f..1a886be1a06d946ff5b14673bdc32d68b9e69a99 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -1216,7 +1216,7 @@ class FixProcessor {
         if (isAbsolute(file) && AnalysisEngine.isDartFileName(file)) {
           String libName = _computeLibraryName(file);
           SourceEdit edit = new SourceEdit(0, 0, 'library $libName;$eol$eol');
-          doSourceChange_addSourceEdit(change, context, source, edit);
+          doSourceChange_addSourceEdit(change, source, edit, isNewFile: true);
           _addFix(DartFixKind.CREATE_FILE, [source.shortName]);
         }
       }
@@ -1435,7 +1435,7 @@ class FixProcessor {
       if (source != null) {
         String libName = unitLibraryElement.name;
         SourceEdit edit = new SourceEdit(0, 0, 'part of $libName;$eol$eol');
-        doSourceChange_addSourceEdit(change, context, source, edit);
+        doSourceChange_addSourceEdit(change, source, edit, isNewFile: true);
         _addFix(DartFixKind.CREATE_FILE, [source.shortName]);
       }
     }