Do not recompile existing functions when enabling allocation tracking

src/heap-profiler.cc

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 #include "v8.h"
 
-#include "deoptimizer.h"
 #include "heap-profiler.h"
 #include "heap-snapshot-generator-inl.h"
 
 namespace v8 {
 namespace internal {
 
 HeapProfiler::HeapProfiler(Heap* heap)
     : snapshots_(new HeapSnapshotsCollection(heap)),
       next_snapshot_uid_(1),
       is_tracking_allocations_(false) {
@@ skipping 112 matching lines @@
                                          RetainedObjectInfo* info) {
   // TODO(yurus, marja): Don't route this information through GlobalHandles.
   heap()->isolate()->global_handles()->SetRetainedObjectInfo(id, info);
 }
 
 
 void HeapProfiler::StartHeapAllocationsRecording() {
   StartHeapObjectsTracking();
   heap()->DisableInlineAllocation();
   is_tracking_allocations_ = true;
-  DropCompiledCode();
   snapshots_->UpdateHeapObjectsMap();
 }
 
 
 void HeapProfiler::StopHeapAllocationsRecording() {
   StopHeapObjectsTracking();
   heap()->EnableInlineAllocation();
   is_tracking_allocations_ = false;
-  DropCompiledCode();
 }
 
 
-void HeapProfiler::DropCompiledCode() {
-  Isolate* isolate = heap()->isolate();
-  HandleScope scope(isolate);
-
-  if (FLAG_concurrent_recompilation) {
-    isolate->optimizing_compiler_thread()->Flush();
-  }
-
-  Deoptimizer::DeoptimizeAll(isolate);
-
-  Handle<Code> lazy_compile =
-      Handle<Code>(isolate->builtins()->builtin(Builtins::kLazyCompile));
-
-  heap()->CollectAllGarbage(Heap::kMakeHeapIterableMask,
-                            "switch allocations tracking");
-
-  DisallowHeapAllocation no_allocation;
-
-  HeapIterator iterator(heap());
-  HeapObject* obj = NULL;
-  while (((obj = iterator.next()) != NULL)) {
-    if (obj->IsJSFunction()) {
-      JSFunction* function = JSFunction::cast(obj);
-      SharedFunctionInfo* shared = function->shared();
-
-      if (!shared->allows_lazy_compilation()) continue;
-      if (!shared->script()->IsScript()) continue;
-
-      Code::Kind kind = function->code()->kind();
-      if (kind == Code::FUNCTION || kind == Code::BUILTIN) {
-        function->set_code(*lazy_compile);
-        shared->set_code(*lazy_compile);
-      }
-    }
-  }
-}
-
-
 } }  // namespace v8::internal