[compiler] Move ClearExceptionFlag into Compiler.

src/compiler.h

 // Copyright 2012 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_COMPILER_H_
 #define V8_COMPILER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/bailout-reason.h"
@@ skipping 565 matching lines @@
 // This is the central hub for dispatching to the various compilers within V8.
 // Logic for which compiler to choose and how to wire compilation results into
 // the object heap should be kept inside this class.
 //
 // General strategy: Source code is translated into an anonymous function w/o
 // parameters which then can be executed. If the source code contains other
 // functions, they might be compiled and allocated as part of the compilation
 // of the source code or deferred for lazy compilation at a later point.
 class Compiler : public AllStatic {
  public:
+  enum ClearExceptionFlag { KEEP_EXCEPTION, CLEAR_EXCEPTION };
   enum ConcurrencyMode { NOT_CONCURRENT, CONCURRENT };
 
   // ===========================================================================
   // The following family of methods ensures a given function is compiled. The
   // general contract is that failures will be reported by returning {false},
   // whereas successful compilation ensures the {is_compiled} predicate on the
   // given function holds.
 
   static bool Compile(Handle<JSFunction> function, ClearExceptionFlag flag);
   static bool CompileOptimized(Handle<JSFunction> function, ConcurrencyMode);
@@ skipping 63 matching lines @@
   // Generate and return code from previously queued optimization job.
   // On failure, return the empty handle.
   MUST_USE_RESULT static MaybeHandle<Code> GetConcurrentlyOptimizedCode(
       OptimizedCompileJob* job);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_H_