Include LineInfo into AnalysisResult to allow reporting errors with lines/columns.

pkg/analyzer/lib/src/dart/analysis/file_state.dart

Index: pkg/analyzer/lib/src/dart/analysis/file_state.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/file_state.dart b/pkg/analyzer/lib/src/dart/analysis/file_state.dart
index 1937d59c5abb684d46f8d4afbd1e04cab22f07bf..d828e31fe48fe486ec2ff2467c0bdf2dd0e1c776 100644
--- a/pkg/analyzer/lib/src/dart/analysis/file_state.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/file_state.dart
@@ -78,6 +78,7 @@ class FileState {
 
   String _content;
   String _contentHash;
+  LineInfo _lineInfo;
   UnlinkedUnit _unlinked;
   List<int> _apiSignature;
 
@@ -106,6 +107,11 @@ class FileState {
   String get contentHash => _contentHash;
 
   /**
+   * Return information about line in the file.
+   */
+  LineInfo get lineInfo => _lineInfo;
+
+  /**
    * Return the list of all direct dependencies.
    */
   List<FileState> get dependencies => _dependencies;
@@ -177,6 +183,7 @@ class FileState {
     }
     // Read the unlinked bundle.
     _unlinked = new UnlinkedUnit.fromBuffer(bytes);
+    _lineInfo = new LineInfo(_unlinked.lineStarts);
     List<int> newApiSignature = _unlinked.apiSignature;
     bool apiSignatureChanged = _apiSignature != null &&
         !_equalByteLists(_apiSignature, newApiSignature);