Fix background compilation queue access. Some cleanups.

runtime/vm/profiler_test.cc

 // Copyright (c) 2013, 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 "platform/assert.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/globals.h"
 #include "vm/profiler.h"
@@ skipping 2347 matching lines @@
   // Token position of * in `i * i`.
   const TokenPosition squarePosition = TokenPosition(6);
 
   // Token position of the call to `doWork`.
   const TokenPosition callPosition = TokenPosition(39);
 
   DisableNativeProfileScope dnps;
   // Disable profiling for this thread.
   DisableThreadInterruptsScope dtis(Thread::Current());
 
+  DisableBackgroundCompilationScope dbcs;
+
   SampleBuffer* sample_buffer = Profiler::sample_buffer();
   EXPECT(sample_buffer != NULL);
 
   Dart_Handle lib = TestCase::LoadTestScript(kScript, NULL);
   EXPECT_VALID(lib);
   Library& root_library = Library::Handle();
   root_library ^= Api::UnwrapHandle(lib);
 
   // Invoke main so that it gets compiled.
   Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
@@ skipping 117 matching lines @@
   EXPECT_SUBSTRING("\"positions\":[\"TempMove\",39]", js.ToCString());
   // Verify exclusive ticks in main.
   EXPECT_SUBSTRING("\"exclusiveTicks\":[1,0]", js.ToCString());
   // Verify inclusive ticks in main.
   EXPECT_SUBSTRING("\"inclusiveTicks\":[1,2]", js.ToCString());
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart