[compiler] Remove support for concurrent OSR.

src/compiler.cc

 // 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.
 
 #include "src/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 1830 matching lines @@
   shared->set_construct_stub(*construct_stub);
 
   // Copy the function data to the shared function info.
   shared->set_function_data(fun->shared()->function_data());
   int parameters = fun->shared()->internal_formal_parameter_count();
   shared->set_internal_formal_parameter_count(parameters);
 
   return shared;
 }
 
-MaybeHandle<Code> Compiler::GetOptimizedCodeForOSR(
-    Handle<JSFunction> function, Compiler::ConcurrencyMode mode,
-    BailoutId osr_ast_id, JavaScriptFrame* osr_frame) {
+MaybeHandle<Code> Compiler::GetOptimizedCodeForOSR(Handle<JSFunction> function,
+                                                   BailoutId osr_ast_id,
+                                                   JavaScriptFrame* osr_frame) {
   DCHECK(!osr_ast_id.IsNone());
-  // TODO(mstarzinger): Once concurrent OSR is removed, the following check
-  // should hold and can be enabled.
-  // DCHECK_NOT_NULL(osr_frame);
-  return GetOptimizedCode(function, mode, osr_ast_id, osr_frame);
+  DCHECK_NOT_NULL(osr_frame);
+  return GetOptimizedCode(function, NOT_CONCURRENT, osr_ast_id, osr_frame);
 }
 
 MaybeHandle<Code> Compiler::GetConcurrentlyOptimizedCode(
     OptimizedCompileJob* job) {
   // Take ownership of compilation info.  Deleting compilation info
   // also tears down the zone and the recompile job.
   base::SmartPointer<CompilationInfo> info(job->info());
   Isolate* isolate = info->isolate();
 
   VMState<COMPILER> state(isolate);
@@ skipping 42 matching lines @@
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate()).PrintProgram(literal()));
 }
 #endif
 
 }  // namespace internal
 }  // namespace v8