Unsampling for the sampling heap profiler

src/profiler/sampling-heap-profiler.h

 // 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.
 
 #ifndef V8_PROFILER_SAMPLING_HEAP_PROFILER_H_
 #define V8_PROFILER_SAMPLING_HEAP_PROFILER_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 93 matching lines @@
   // Methods that construct v8::AllocationProfile.
 
   // Translates the provided AllocationNode *node* returning an equivalent
   // AllocationProfile::Node. The newly created AllocationProfile::Node is added
   // to the provided AllocationProfile *profile*. Line numbers, column numbers,
   // and script names are resolved using *scripts* which maps all currently
   // loaded scripts keyed by their script id.
   v8::AllocationProfile::Node* TranslateAllocationNode(
       AllocationProfile* profile, SamplingHeapProfiler::AllocationNode* node,
       const std::map<int, Script*>& scripts);
+  v8::AllocationProfile::Allocation ScaleSample(size_t size,
+                                                unsigned int count);
   AllocationNode* AddStack();
   AllocationNode* FindOrAddChildNode(AllocationNode* parent, const char* name,
                                      int script_id, int start_position);
 
   Isolate* const isolate_;
   Heap* const heap_;
   base::SmartPointer<SamplingAllocationObserver> new_space_observer_;
   base::SmartPointer<SamplingAllocationObserver> other_spaces_observer_;
   StringsStorage* const names_;
   AllocationNode profile_root_;
   std::set<Sample*> samples_;
   const int stack_depth_;
+  const uint64_t rate_;
 
   friend class SamplingAllocationObserver;
 };
 
 class SamplingAllocationObserver : public AllocationObserver {
  public:
   SamplingAllocationObserver(Heap* heap, intptr_t step_size, uint64_t rate,
                              SamplingHeapProfiler* profiler,
                              base::RandomNumberGenerator* random)
       : AllocationObserver(step_size),
@@ skipping 18 matching lines @@
   SamplingHeapProfiler* const profiler_;
   Heap* const heap_;
   base::RandomNumberGenerator* const random_;
   uint64_t const rate_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PROFILER_SAMPLING_HEAP_PROFILER_H_