Fix for cascade sections SourceInfo

compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java

Index: compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
diff --git a/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java b/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
index 9fc8bfe01ff7dc49001df495203ba83d5ddb0c5e..bf007e6cb0342f67554db38a3672115889469143 100644
--- a/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
+++ b/compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java
@@ -110,11 +110,17 @@ public class SyntaxTest extends AbstractParserTest {
   }
 
   public void test_cascade() {
-    parseUnit("cascade.dart", Joiner.on("\n").join(
-        "class C {",
-        "  var f = g..m1()..m2()..f.a;",
-        "  var f = g..[3].x()..y()();",
-        "}"));
+    parseUnit(
+        "cascade.dart",
+        Joiner.on("\n").join(
+            "// filler filler filler filler filler filler filler filler filler filler",
+            "class C {",
+            "  var f = g..m1()..m2()..f.a;",
+            "  var f = g..[3].x()..y()();",
+            "}"));
+    // test that cascaded invocations have reasonable SourceInfo
+    assertNodeSourceInfo("..m1()");
+    assertNodeSourceInfo("..m2()");
   }
 
 //  public void test_cascade2() {