Include source in kernel.

pkg/kernel/lib/binary/ast_from_binary.dart

Index: pkg/kernel/lib/binary/ast_from_binary.dart
diff --git a/pkg/kernel/lib/binary/ast_from_binary.dart b/pkg/kernel/lib/binary/ast_from_binary.dart
index 39b1b9870c036771d2e10e762ff85e0a0fdf3179..6b7f0dfca7aacda45747aab5b6878200326cac90 100644
--- a/pkg/kernel/lib/binary/ast_from_binary.dart
+++ b/pkg/kernel/lib/binary/ast_from_binary.dart
@@ -177,7 +177,8 @@ class BinaryBuilder {
           'Magic number was: ${magic.toRadixString(16)}');
     }
     readStringTable();
-    Map<String, List<int>> uriToLineStarts = readUriToLineStarts();
+    Map<String, LineStartsAndSource> uriToLineStartsAndSource =
+        readUriToLineStartsAndSource();
     importTable.length = readUInt();
     for (int i = 0; i < importTable.length; ++i) {
       importTable[i] = new Library(null);
@@ -187,15 +188,17 @@ class BinaryBuilder {
       readLibrary();
     }
     var mainMethod = readMemberReference(allowNull: true);
-    return new Program(importTable, uriToLineStarts)..mainMethod = mainMethod;
+    return new Program(importTable, uriToLineStartsAndSource)
+      ..mainMethod = mainMethod;
   }
 
-  Map<String, List<int>> readUriToLineStarts() {
+  Map<String, LineStartsAndSource> readUriToLineStartsAndSource() {
     readSourceUriTable();
     int length = _sourceUriTable.length;
-    Map<String, List<int>> uriToLineStarts = {};
+    Map<String, LineStartsAndSource> uriToLineStarts = {};

[Kevin Millikin (Google), 2016/12/20 12:03:33]

<String, LineStartsAndSource>{}.

[jensj, 2016/12/20 13:30:22]

Done.

     for (int i = 0; i < length; ++i) {
       String uri = _sourceUriTable[i];
+      String sourceCode = readStringEntry();
       int lineCount = readUInt();
       List<int> lineStarts = new List<int>(lineCount);
       int previousLineStart = 0;
@@ -204,7 +207,7 @@ class BinaryBuilder {
         lineStarts[j] = lineStart;
         previousLineStart = lineStart;
       }
-      uriToLineStarts[uri] = lineStarts;
+      uriToLineStarts[uri] = new LineStartsAndSource(lineStarts, sourceCode);
     }
     return uriToLineStarts;
   }