[turbofan] Make Pipeline more private.

src/compiler/pipeline.cc

 // Copyright 2014 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/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 487 matching lines @@
         }
       }
       json_of << "\",\n\"phases\":[";
       fclose(json_file);
     }
   }
 
   return pipeline_statistics;
 }
 
+}  // namespace
+
 class PipelineCompilationJob final : public CompilationJob {
  public:
   PipelineCompilationJob(Isolate* isolate, Handle<JSFunction> function)
       // Note that the CompilationInfo is not initialized at the time we pass it
       // to the CompilationJob constructor, but it is not dereferenced there.
       : CompilationJob(&info_, "TurboFan"),
         zone_(isolate->allocator()),
         zone_pool_(isolate->allocator()),
         parse_info_(&zone_, function),
         info_(&parse_info_, function),
@@ skipping 62 matching lines @@
   }
   info()->dependencies()->Commit(code);
   info()->SetCode(code);
   if (info()->is_deoptimization_enabled()) {
     info()->context()->native_context()->AddOptimizedCode(*code);
     RegisterWeakObjectsInOptimizedCode(code);
   }
   return SUCCEEDED;
 }
 
-}  // namespace
-
 class PipelineWasmCompilationJob final : public CompilationJob {
  public:
   explicit PipelineWasmCompilationJob(CompilationInfo* info, Graph* graph,
                                       CallDescriptor* descriptor,
                                       SourcePositionTable* source_positions)
       : CompilationJob(info, "TurboFan"),
         zone_pool_(info->isolate()->allocator()),
         data_(&zone_pool_, info, graph, source_positions),
         pipeline_(&data_),
         linkage_(descriptor) {}
@@ skipping 1173 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* Pipeline::info() const { return data_->info(); }
 
 Isolate* Pipeline::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8