[tracing] Track number of allocations in heap profiler

third_party/WebKit/Source/platform/web_process_memory_dump_impl.cc

Index: third_party/WebKit/Source/platform/web_process_memory_dump_impl.cc
diff --git a/third_party/WebKit/Source/platform/web_process_memory_dump_impl.cc b/third_party/WebKit/Source/platform/web_process_memory_dump_impl.cc
index 2e1745b0f5f706dd3a72f66b62add62f6355a152..cc4c5559a1d4b5dead4b7c8db2d272e4db0a72de 100644
--- a/third_party/WebKit/Source/platform/web_process_memory_dump_impl.cc
+++ b/third_party/WebKit/Source/platform/web_process_memory_dump_impl.cc
@@ -167,21 +167,21 @@ WebProcessMemoryDumpImpl::createDiscardableMemoryAllocatorDump(
 }
 
 void WebProcessMemoryDumpImpl::dumpHeapUsage(
-    const base::hash_map<base::trace_event::AllocationContext, size_t>&
-        bytes_by_context,
+    const base::hash_map<base::trace_event::AllocationContext,
+        base::trace_event::AllocationsSizeAndCount>& metrics_by_context,
     base::trace_event::TraceEventMemoryOverhead& overhead,
     const char* allocator_name) {
-  if (!bytes_by_context.empty()) {
+  if (!metrics_by_context.empty()) {
     scoped_refptr<base::trace_event::MemoryDumpSessionState> session_state =
         process_memory_dump_->session_state();
     scoped_ptr<base::trace_event::TracedValue> heap_dump = ExportHeapDump(
-        bytes_by_context, session_state->stack_frame_deduplicator(),
+        metrics_by_context, session_state->stack_frame_deduplicator(),
         session_state->type_name_deduplicator());
     process_memory_dump_->AddHeapDump(allocator_name, std::move(heap_dump));
   }
 
   std::string base_name = base::StringPrintf("tracing/heap_profiler_%s",
-                                             allocator_name);
+      allocator_name);
   overhead.DumpInto(base_name.c_str(), process_memory_dump_);
 }