Eliminate RETURN_IF_EMPTY_HANDLE macro

src/compiler.h

 // Copyright 2012 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 597 matching lines @@
 // parameters which then can be executed. If the source code contains other
 // functions, they will be compiled and allocated as part of the compilation
 // of the source code.
 
 // Please note this interface returns shared function infos.  This means you
 // need to call Factory::NewFunctionFromSharedFunctionInfo before you have a
 // real function with a context.
 
 class Compiler : public AllStatic {
  public:
-  static Handle<Code> GetUnoptimizedCode(Handle<JSFunction> function);
-  static Handle<Code> GetUnoptimizedCode(Handle<SharedFunctionInfo> shared);
+  MUST_USE_RESULT static MaybeHandle<Code> GetUnoptimizedCode(
+      Handle<JSFunction> function);
+  MUST_USE_RESULT static MaybeHandle<Code> GetUnoptimizedCode(
+      Handle<SharedFunctionInfo> shared);
   static bool EnsureCompiled(Handle<JSFunction> function,
                              ClearExceptionFlag flag);
-  static Handle<Code> GetCodeForDebugging(Handle<JSFunction> function);
+  MUST_USE_RESULT static MaybeHandle<Code> GetCodeForDebugging(
+      Handle<JSFunction> function);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   static void CompileForLiveEdit(Handle<Script> script);
 #endif
 
   // Compile a String source within a context for eval.
   MUST_USE_RESULT static MaybeHandle<JSFunction> GetFunctionFromEval(
       Handle<String> source,
       Handle<Context> context,
       StrictMode strict_mode,
@@ skipping 15 matching lines @@
 
   // Create a shared function info object (the code may be lazily compiled).
   static Handle<SharedFunctionInfo> BuildFunctionInfo(FunctionLiteral* node,
                                                       Handle<Script> script);
 
   enum ConcurrencyMode { NOT_CONCURRENT, CONCURRENT };
 
   // Generate and return optimized code or start a concurrent optimization job.
   // In the latter case, return the InOptimizationQueue builtin.  On failure,
   // return the empty handle.
-  static Handle<Code> GetOptimizedCode(
+  MUST_USE_RESULT static MaybeHandle<Code> GetOptimizedCode(
       Handle<JSFunction> function,
       Handle<Code> current_code,
       ConcurrencyMode mode,
       BailoutId osr_ast_id = BailoutId::None());
 
   // Generate and return code from previously queued optimization job.
   // On failure, return the empty handle.
   static Handle<Code> GetConcurrentlyOptimizedCode(OptimizedCompileJob* job);
 
   static void RecordFunctionCompilation(Logger::LogEventsAndTags tag,
@@ skipping 22 matching lines @@
   unsigned info_zone_start_allocation_size_;
   ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_