[tracing] Track number of allocations in heap profiler

third_party/WebKit/public/platform/WebProcessMemoryDump.h

 // Copyright 2015 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.
 
 #ifndef WebProcessMemoryDump_h
 #define WebProcessMemoryDump_h
 
 #include "WebCommon.h"
 #include "WebMemoryAllocatorDump.h"
 #include "WebMemoryDumpProvider.h"
@@ skipping 72 matching lines @@
     // by WebProcessMemoryDump and cannot outlive the WebProcessMemoryDump
     // object owning them. |dumpNamePrefix| is prefix appended to each dump
     // created by the SkTraceMemoryDump implementation, if the dump should be
     // placed under different namespace and not "skia".
     virtual SkTraceMemoryDump* createDumpAdapterForSkia(const WebString& dumpNamePrefix) = 0;
 
     virtual blink::WebMemoryAllocatorDump* createDiscardableMemoryAllocatorDump(const std::string& name, base::DiscardableMemory*) = 0;
 
     // Dumps heap memory usage. |allocatorName| is used as an absolute name for
     // base::trace_event::ProcessMemoryDump::AddHeapDump.
-    virtual void dumpHeapUsage(const base::hash_map<base::trace_event::AllocationContext, size_t>& bytesByContext, base::trace_event::TraceEventMemoryOverhead&, const char* allocatorName) = 0;
+    virtual void dumpHeapUsage(const base::hash_map<base::trace_event::AllocationContext, base::trace_event::AllocationMetrics>& metricsByContext, base::trace_event::TraceEventMemoryOverhead&, const char* allocatorName) = 0;
 };
 
 } // namespace blink
 
 #endif // WebProcessMemoryDump_h