[tracing] Switch to new heap dump format.

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

Index: third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.cc
diff --git a/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.cc b/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.cc
index 8030ded46dc178435266e421b951395e6a00a79e..aa03af9e9c2c9f929a4c3449e481180ff88f3c82 100644
--- a/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.cc
+++ b/third_party/WebKit/Source/platform/instrumentation/tracing/web_process_memory_dump.cc
@@ -174,14 +174,4 @@ WebProcessMemoryDump::createDiscardableMemoryAllocatorDump(
   return createWebMemoryAllocatorDump(dump);
 }
 
-void WebProcessMemoryDump::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) {
-  process_memory_dump_->DumpHeapUsage(metrics_by_context, overhead,
-                                      allocator_name);
-}
-
 }  // namespace content