[compiler] Remove deprecated CompilationJob status.

src/optimizing-compile-dispatcher.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/optimizing-compile-dispatcher.h"
 
 #include "src/base/atomicops.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/isolate.h"
 #include "src/tracing/trace-event.h"
@@ skipping 89 matching lines @@
     }
   }
   return job;
 }
 
 void OptimizingCompileDispatcher::CompileNext(CompilationJob* job) {
   if (!job) return;
 
   // The function may have already been optimized by OSR.  Simply continue.
   CompilationJob::Status status = job->OptimizeGraph();
-  USE(status);  // Prevent an unused-variable error in release mode.
-  DCHECK(status != CompilationJob::FAILED);
+  USE(status);  // Prevent an unused-variable error.
 
   // The function may have already been optimized by OSR.  Simply continue.
   // Use a mutex to make sure that functions marked for install
   // are always also queued.
   base::LockGuard<base::Mutex> access_output_queue_(&output_queue_mutex_);
   output_queue_.push(job);
   isolate_->stack_guard()->RequestInstallCode();
 }
 
 
@@ skipping 95 matching lines @@
   while (blocked_jobs_ > 0) {
     V8::GetCurrentPlatform()->CallOnBackgroundThread(
         new CompileTask(isolate_), v8::Platform::kShortRunningTask);
     blocked_jobs_--;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8