[compiler] Remove support for concurrent OSR.

src/objects.cc

 // Copyright 2015 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 12229 matching lines @@
 }
 
 
 void JSFunction::AttemptConcurrentOptimization() {
   Isolate* isolate = GetIsolate();
   if (!isolate->concurrent_recompilation_enabled() ||
       isolate->bootstrapper()->IsActive()) {
     MarkForOptimization();
     return;
   }
-  if (isolate->concurrent_osr_enabled() &&
-      isolate->optimizing_compile_dispatcher()->IsQueuedForOSR(this)) {
-    // Do not attempt regular recompilation if we already queued this for OSR.
-    // TODO(yangguo): This is necessary so that we don't install optimized
-    // code on a function that is already optimized, since OSR and regular
-    // recompilation race.  This goes away as soon as OSR becomes one-shot.
-    return;
-  }
   DCHECK(!IsInOptimizationQueue());
   DCHECK(!IsOptimized());
   DCHECK(shared()->allows_lazy_compilation() ||
          !shared()->optimization_disabled());
   DCHECK(isolate->concurrent_recompilation_enabled());
   if (FLAG_trace_concurrent_recompilation) {
     PrintF("  ** Marking ");
     ShortPrint();
     PrintF(" for concurrent recompilation.\n");
   }
@@ skipping 7488 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8