[tracing] Switch to new heap dump format.

third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.h

Index: third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.h
diff --git a/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.h b/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.h
index ed02763f5c3ec157ff9ed712f57a7ce2e4dfffba..423ddf16b98a513c2a4308e6a34314193946321a 100644
--- a/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.h
+++ b/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.h
@@ -26,7 +26,6 @@ class DiscardableMemory;
 namespace trace_event {
 class MemoryAllocatorDump;
 class ProcessMemoryDump;
-class TraceEventMemoryOverhead;
 }  // namespace base
 }  // namespace trace_event
 
@@ -124,15 +123,6 @@ class PLATFORM_EXPORT WebProcessMemoryDump final {
       const std::string& name,
       base::DiscardableMemory* discardable);
 
-  // Dumps heap memory usage. |allocatorName| is used as an absolute name for
-  // base::trace_event::ProcessMemoryDump::DumpHeapUsage().
-  void DumpHeapUsage(
-      const std::unordered_map<base::trace_event::AllocationContext,
-                               base::trace_event::AllocationMetrics>&
-          metrics_by_context,
-      base::trace_event::TraceEventMemoryOverhead& overhead,
-      const char* allocator_name);
-
  private:
   FRIEND_TEST_ALL_PREFIXES(WebProcessMemoryDumpTest, IntegrationTest);