Remove support for the old Span classes from source_maps.

pkg/source_maps/test/common.dart

 // Copyright (c) 2013, 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.
 
 /// Common input/output used by builder, parser and end2end tests
 library test.common;
 
 import 'package:source_maps/source_maps.dart';
+import 'package:source_span/source_span.dart';
 import 'package:unittest/unittest.dart';
 
 /// Content of the source file
 const String INPUT = '''
 /** this is a comment. */
 int longVar1 = 3;
 
 // this is a comment too
 int longName(int longVar2) {
   return longVar1 + longVar2;
 }
 ''';
-var input = new SourceFile.text('input.dart', INPUT);
+var input = new SourceFile(INPUT, url: 'input.dart');
 
 /// A span in the input file
-Span ispan(int start, int end, [bool isIdentifier = false]) =>
-    new FileSpan(input, start, end, isIdentifier);
+SourceMapSpan ispan(int start, int end, [bool isIdentifier = false]) =>
+    new SourceMapFileSpan(input.span(start, end), isIdentifier: isIdentifier);
 
-Span inputVar1 = ispan(30, 38, true);
-Span inputFunction = ispan(74, 82, true);
-Span inputVar2 = ispan(87, 95, true);
+SourceMapSpan inputVar1 = ispan(30, 38, true);
+SourceMapSpan inputFunction = ispan(74, 82, true);
+SourceMapSpan inputVar2 = ispan(87, 95, true);
 
-Span inputVar1NoSymbol = ispan(30, 38);
-Span inputFunctionNoSymbol = ispan(74, 82);
-Span inputVar2NoSymbol = ispan(87, 95);
+SourceMapSpan inputVar1NoSymbol = ispan(30, 38);
+SourceMapSpan inputFunctionNoSymbol = ispan(74, 82);
+SourceMapSpan inputVar2NoSymbol = ispan(87, 95);
 
-Span inputExpr = ispan(108, 127);
+SourceMapSpan inputExpr = ispan(108, 127);
 
 /// Content of the target file
 const String OUTPUT = '''
 var x = 3;
 f(y) => x + y;
 ''';
-var output = new SourceFile.text('output.dart', OUTPUT);
+var output = new SourceFile(OUTPUT, url: 'output.dart');
 
 /// A span in the output file
-Span ospan(int start, int end, [bool isIdentifier = false]) =>
-    new FileSpan(output, start, end, isIdentifier);
+SourceMapSpan ospan(int start, int end, [bool isIdentifier = false]) =>
+    new SourceMapFileSpan(output.span(start, end), isIdentifier: isIdentifier);
 
-Span outputVar1 = ospan(4, 5, true);
-Span outputFunction = ospan(11, 12, true);
-Span outputVar2 = ospan(13, 14, true);
-Span outputVar1NoSymbol = ospan(4, 5);
-Span outputFunctionNoSymbol = ospan(11, 12);
-Span outputVar2NoSymbol = ospan(13, 14);
-Span outputExpr = ospan(19, 24);
+SourceMapSpan outputVar1 = ospan(4, 5, true);
+SourceMapSpan outputFunction = ospan(11, 12, true);
+SourceMapSpan outputVar2 = ospan(13, 14, true);
+SourceMapSpan outputVar1NoSymbol = ospan(4, 5);
+SourceMapSpan outputFunctionNoSymbol = ospan(11, 12);
+SourceMapSpan outputVar2NoSymbol = ospan(13, 14);
+SourceMapSpan outputExpr = ospan(19, 24);
 
 /// Expected output mapping when recording the following four mappings:
 ///      inputVar1       <=   outputVar1
 ///      inputFunction   <=   outputFunction
 ///      inputVar2       <=   outputVar2
 ///      inputExpr       <=   outputExpr
 ///
 /// This mapping is stored in the tests so we can independently test the builder
 /// and parser algorithms without relying entirely on end2end tests.
 const Map<String, dynamic> EXPECTED_MAP = const {
     'version': 3,
     'sourceRoot': '',
     'sources': const ['input.dart'],
     'names': const ['longVar1','longName','longVar2'],
     'mappings': 'IACIA;AAGAC,EAAaC,MACR',
     'file': 'output.dart'
 };
 
-check(Span outputSpan, Mapping mapping, Span inputSpan, bool realOffsets) {
+check(SourceSpan outputSpan, Mapping mapping, SourceMapSpan inputSpan,
+    bool realOffsets) {
   var line = outputSpan.start.line;
   var column = outputSpan.start.column;
   var files = realOffsets ? {'input.dart': input} : null; 
   var span = mapping.spanFor(line, column, files: files);
   var span2 = mapping.spanForLocation(outputSpan.start, files: files);
 
   // Both mapping APIs are equivalent.
   expect(span.start.offset, span2.start.offset);
   expect(span.start.line, span2.start.line);
   expect(span.start.column, span2.start.column);
@@ skipping 12 matching lines @@
     expect(span.end.line, inputSpan.end.line);
     expect(span.end.column, inputSpan.end.column);
     expect(span.end.offset, span.start.offset + inputSpan.text.length);
     if (realOffsets) expect(span.end.offset, inputSpan.end.offset);
   } else {
     expect(span.end.offset, span.start.offset);
     expect(span.end.line, span.start.line);
     expect(span.end.column, span.start.column);
   }
 }