[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 d1f84749aea498ddb19fd2b72fd34d718269ad77..976a7c3ca8bc4e025de3a4e8c881d063369315c4 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
@@ -24,7 +24,6 @@ class DiscardableMemory;
 namespace trace_event {
 class MemoryAllocatorDump;
 class ProcessMemoryDump;
-class TraceEventMemoryOverhead;
 }  // namespace base
 }  // namespace trace_event
 
@@ -122,14 +121,6 @@ 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 base::hash_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);