Reland "Remove support for thread-based recompilation"

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.h"
 #include "src/bailout-reason.h"
@@ skipping 354 matching lines @@
 
   Handle<Foreign> object_wrapper() {
     if (object_wrapper_.is_null()) {
       object_wrapper_ =
           isolate()->factory()->NewForeign(reinterpret_cast<Address>(this));
     }
     return object_wrapper_;
   }
 
   void AbortDueToDependencyChange() {
-    DCHECK(!OptimizingCompilerThread::IsOptimizerThread(isolate()));
     aborted_due_to_dependency_change_ = true;
   }
 
   bool HasAbortedDueToDependencyChange() const {
-    DCHECK(!OptimizingCompilerThread::IsOptimizerThread(isolate()));
     return aborted_due_to_dependency_change_;
   }
 
   bool HasSameOsrEntry(Handle<JSFunction> function, BailoutId osr_ast_id) {
     return osr_ast_id_ == osr_ast_id && function.is_identical_to(closure());
   }
 
   int optimization_id() const { return optimization_id_; }
 
   int osr_expr_stack_height() { return osr_expr_stack_height_; }
@@ skipping 301 matching lines @@
   Zone zone_;
   size_t info_zone_start_allocation_size_;
   base::ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_