Revert of [Compiler] Track Ignition background compilation separately in RuntimeStats.

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 <memory>
 
 #include "src/allocation.h"
@@ skipping 149 matching lines @@
     kSucceeded,
     kFailed,
   };
 
   CompilationJob(Isolate* isolate, CompilationInfo* info,
                  const char* compiler_name,
                  State initial_state = State::kReadyToPrepare)
       : info_(info),
         compiler_name_(compiler_name),
         state_(initial_state),
-        stack_limit_(isolate->stack_guard()->real_climit()),
-        executed_on_background_thread_(false) {}
+        stack_limit_(isolate->stack_guard()->real_climit()) {}
   virtual ~CompilationJob() {}
 
   // Prepare the compile job. Must be called on the main thread.
   MUST_USE_RESULT Status PrepareJob();
 
   // Executes the compile job. Can be called on a background thread if
   // can_execute_on_background_thread() returns true.
   MUST_USE_RESULT Status ExecuteJob();
 
   // Finalizes the compile job. Must be called on the main thread.
   MUST_USE_RESULT Status FinalizeJob();
 
   // Report a transient failure, try again next time. Should only be called on
   // optimization compilation jobs.
   Status RetryOptimization(BailoutReason reason);
 
   // Report a persistent failure, disable future optimization on the function.
   // Should only be called on optimization compilation jobs.
   Status AbortOptimization(BailoutReason reason);
 
   void RecordOptimizedCompilationStats() const;
   void RecordUnoptimizedCompilationStats() const;
 
   virtual bool can_execute_on_background_thread() const { return true; }
 
   void set_stack_limit(uintptr_t stack_limit) { stack_limit_ = stack_limit; }
   uintptr_t stack_limit() const { return stack_limit_; }
 
-  bool executed_on_background_thread() const {
-    DCHECK_IMPLIES(!can_execute_on_background_thread(),
-                   !executed_on_background_thread_);
-    return executed_on_background_thread_;
-  }
   State state() const { return state_; }
   CompilationInfo* info() const { return info_; }
   Isolate* isolate() const;
 
  protected:
   // Overridden by the actual implementation.
   virtual Status PrepareJobImpl() = 0;
   virtual Status ExecuteJobImpl() = 0;
   virtual Status FinalizeJobImpl() = 0;
 
   // Registers weak object to optimized code dependencies.
   // TODO(turbofan): Move this to pipeline.cc once Crankshaft dies.
   void RegisterWeakObjectsInOptimizedCode(Handle<Code> code);
 
  private:
   CompilationInfo* info_;
   base::TimeDelta time_taken_to_prepare_;
   base::TimeDelta time_taken_to_execute_;
   base::TimeDelta time_taken_to_finalize_;
   const char* compiler_name_;
   State state_;
   uintptr_t stack_limit_;
-  bool executed_on_background_thread_;
 
   MUST_USE_RESULT Status UpdateState(Status status, State next_state) {
     if (status == SUCCEEDED) {
       state_ = next_state;
     } else {
       state_ = State::kFailed;
     }
     return status;
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_H_