[tracing] directly use memory-infra from blink -> base

third_party/WebKit/Source/platform/heap/Heap.cpp

Index: third_party/WebKit/Source/platform/heap/Heap.cpp
diff --git a/third_party/WebKit/Source/platform/heap/Heap.cpp b/third_party/WebKit/Source/platform/heap/Heap.cpp
index f61dc9eb9f29c4a113fb9f71116f6250b84dcedd..20f9eb4da81333364cf4090116dc281dd40f13e1 100644
--- a/third_party/WebKit/Source/platform/heap/Heap.cpp
+++ b/third_party/WebKit/Source/platform/heap/Heap.cpp
@@ -41,8 +41,6 @@
 #include "platform/heap/SafePoint.h"
 #include "platform/heap/ThreadState.h"
 #include "public/platform/Platform.h"
-#include "public/platform/WebMemoryAllocatorDump.h"
-#include "public/platform/WebProcessMemoryDump.h"
 #include "wtf/Assertions.h"
 #include "wtf/DataLog.h"
 #include "wtf/LeakAnnotations.h"
@@ -175,13 +173,13 @@ void Heap::init()
     GCInfoTable::init();
 
     if (Platform::current() && Platform::current()->currentThread())
-        Platform::current()->registerMemoryDumpProvider(BlinkGCMemoryDumpProvider::instance());
+        base::trace_event::MemoryDumpProvider::RegisterOnCurrentThread(BlinkGCMemoryDumpProvider::instance());
 }
 
 void Heap::shutdown()
 {
     if (Platform::current() && Platform::current()->currentThread())
-        Platform::current()->unregisterMemoryDumpProvider(BlinkGCMemoryDumpProvider::instance());
+        base::trace_event::MemoryDumpProvider::Unregister(BlinkGCMemoryDumpProvider::instance());
     s_shutdownCalled = true;
     ThreadState::shutdownHeapIfNecessary();
 }