Add a test for OptimizingCompileDispatcher::Flush's non-blocking behavior

src/compilation-info.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILATION_INFO_H_
 #define V8_COMPILATION_INFO_H_
 
 #include <memory>
 
 #include "src/compilation-dependencies.h"
 #include "src/frames.h"
+#include "src/globals.h"
 #include "src/handles.h"
 #include "src/objects.h"
 #include "src/source-position-table.h"
 #include "src/utils.h"
 #include "src/vector.h"
 
 namespace v8 {
 namespace internal {
 
 class DeclarationScope;
 class DeferredHandles;
 class FunctionLiteral;
 class JavaScriptFrame;
 class ParseInfo;
 class Isolate;
 class Zone;
 
 // CompilationInfo encapsulates some information known at compile time.  It
 // is constructed based on the resources available at compile-time.
-class CompilationInfo final {
+class V8_EXPORT_PRIVATE CompilationInfo final {
  public:
   // Various configuration flags for a compilation, as well as some properties
   // of the compiled code produced by a compilation.
   enum Flag {
     kDeferredCalling = 1 << 0,
     kNonDeferredCalling = 1 << 1,
     kSavesCallerDoubles = 1 << 2,
     kRequiresFrame = 1 << 3,
     kDeoptimizationSupport = 1 << 4,
     kAccessorInliningEnabled = 1 << 5,
@@ skipping 343 matching lines @@
 
   Vector<const char> debug_name_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILATION_INFO_H_