[tracing] Use trace event profiling for heap profiling

skia/ext/event_tracer_impl.cc

 // Copyright 2014 The Chromium 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 <stdint.h>
 
+#include "base/trace_event/heap_profiler_allocation_context_tracker.h"
 #include "base/trace_event/trace_event.h"
 #include "skia/ext/event_tracer_impl.h"
 #include "third_party/skia/include/utils/SkEventTracer.h"
 
 namespace skia {
 
 class SkChromiumEventTracer: public SkEventTracer {
   const uint8_t* getCategoryGroupEnabled(const char* name) override;
   const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) override;
   SkEventTracer::Handle addTraceEvent(char phase,
                                       const uint8_t* categoryEnabledFlag,
                                       const char* name,
                                       uint64_t id,
                                       int32_t numArgs,
                                       const char** argNames,
                                       const uint8_t* argTypes,
                                       const uint64_t* argValues,
                                       uint8_t flags) override;
   void updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
                                 const char* name,
                                 SkEventTracer::Handle handle) override;
+  void pushPseudoStackFrame(const char* stack_frame) override;
+  void popPseudoStackFrame(const char* stack_frame) override;
 };
 
 const uint8_t*
   SkChromiumEventTracer::getCategoryGroupEnabled(const char* name) {
     return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(name);
 }
 
+void SkChromiumEventTracer::pushPseudoStackFrame(const char* stack_frame) {
+  base::trace_event::AllocationContextTracker::GetInstanceForCurrentThread()
+      ->PushPseudoStackFrame(stack_frame);
+}
+
+void SkChromiumEventTracer::popPseudoStackFrame(const char* stack_frame) {
+  base::trace_event::AllocationContextTracker::GetInstanceForCurrentThread()
+      ->PopPseudoStackFrame(stack_frame);
+}
+
 const char* SkChromiumEventTracer::getCategoryGroupName(
       const uint8_t* categoryEnabledFlag) {
   return base::trace_event::TraceLog::GetCategoryGroupName(categoryEnabledFlag);
 }
 
 SkEventTracer::Handle
     SkChromiumEventTracer::addTraceEvent(char phase,
                                          const uint8_t* categoryEnabledFlag,
                                          const char* name,
                                          uint64_t id,
@@ skipping 24 matching lines @@
 
 }  // namespace skia
 
 
 void InitSkiaEventTracer() {
   // Initialize the binding to Skia's tracing events. Skia will
   // take ownership of and clean up the memory allocated here.
   if (!SkEventTracer::GetInstance())
     SkEventTracer::SetInstance(new skia::SkChromiumEventTracer());
 }