Fix various memory leaks in unit tests detected by a new version of ASAN.

runtime/vm/unit_test.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/unit_test.h"
 
 #include <stdio.h>
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
@@ skipping 34 matching lines @@
 void TestCaseBase::RunAll() {
   TestCaseBase* test = first_;
   while (test != NULL) {
     test->RunTest();
     test = test->next_;
   }
 }
 
 
 Dart_Isolate TestCase::CreateIsolate(const uint8_t* buffer, const char* name) {
-  bin::IsolateData* isolate_data = new bin::IsolateData(name, NULL, NULL);
+  bin::IsolateData* isolate_data = NULL;
   char* err;
   Dart_Isolate isolate =
       Dart_CreateIsolate(name, NULL, buffer, NULL, isolate_data, &err);

[zra, 2017/01/11 19:05:21]

ditto

[rmacnak, 2017/01/11 19:11:08]

Done.

   if (isolate == NULL) {
     OS::Print("Creation of isolate failed '%s'\n", err);
     free(err);
   }
   EXPECT(isolate != NULL);
   return isolate;
 }
 
 
 static const char* kPackageScheme = "package:";
@@ skipping 411 matching lines @@
   }
   // Copy the remainder of in to out.
   while (*in != '\0') {
     *out++ = *in++;
   }
   *out = '\0';
 }
 
 
 }  // namespace dart