Report messages instead of just printing.

runtime/vm/isolate_reload_test.cc

Index: runtime/vm/isolate_reload_test.cc
diff --git a/runtime/vm/isolate_reload_test.cc b/runtime/vm/isolate_reload_test.cc
index 218ecb142b22f95fe02fb028b373967c8910ce9b..c50156eed377dd60bd71896b034ce4b645cbcb09 100644
--- a/runtime/vm/isolate_reload_test.cc
+++ b/runtime/vm/isolate_reload_test.cc
@@ -3309,7 +3309,7 @@ TEST_CASE(IsolateReload_RunNewFieldInitializersSyntaxError) {
   // The reload fails because the initializing expression is parsed at
   // class finalization time.
   lib = TestCase::ReloadTestScript(kReloadScript);
-  EXPECT_ERROR(lib, "......");

[ahe, 2017/07/14 11:45:07]

This relied on having a source snippet. For legacy reasons, the scanner
recognizes "..." as a single token, so that is included in the error message.

However, I think we should restore the source snippets, but we can discuss that
later.

+  EXPECT_ERROR(lib, "...");
 }
 
 
@@ -3346,7 +3346,7 @@ TEST_CASE(IsolateReload_RunNewFieldInitializersSyntaxError2) {
   // The reload fails because the initializing expression is parsed at
   // class finalization time.
   lib = TestCase::ReloadTestScript(kReloadScript);
-  EXPECT_ERROR(lib, "......");
+  EXPECT_ERROR(lib, "...");
 }