[Isolates] Fix Linux build in Isolates branch.

test/cctest/test-api.cc

 // Copyright 2007-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 11238 matching lines @@
 }
 
 TEST(RunDefaultAndAnotherIsolate) {
   v8::HandleScope scope;
   LocalContext context;
 
   // Enter new isolate.
   v8::Isolate* isolate = v8::Isolate::New();
   CHECK(isolate);
   isolate->Enter();
-  v8::HandleScope scope_new;
-  LocalContext context_new;
-
-  // Run something in new isolate.
-  CompileRun("var foo = 153;");
-  ExpectTrue("function f() { return foo == 153; }; f()");
+  { // Need this block because subsequent Exit() will deallocate Heap,
+    // so we need all scope objects to be deconstructed when it happens.
+    v8::HandleScope scope_new;
+    LocalContext context_new;
+  
+    // Run something in new isolate.
+    CompileRun("var foo = 153;");
+    ExpectTrue("function f() { return foo == 153; }; f()");
+  }
   isolate->Exit();
 
   // This runs automatically in default isolate.
   // Variables in another isolate should be not available.
   ExpectTrue("function f() {"
              "  try {"
              "    foo;"
              "    return false;"
              "  } catch(e) {"
              "    return true;"
@@ skipping 156 matching lines @@
   CHECK(result1 == 10946);
   CHECK(result2 == 144);
   CHECK(result1 == thread1.result());
   CHECK(result2 == thread2.result());
 
   isolate1->Dispose();
   isolate2->Dispose();
 }