gpu: Reduce direct use of BrowserGpuMemoryBufferManager

content/browser/browser_process_sub_thread.cc

Index: content/browser/browser_process_sub_thread.cc
diff --git a/content/browser/browser_process_sub_thread.cc b/content/browser/browser_process_sub_thread.cc
index 71f1396dbdef051e5e05126d34f65568bd6d19cf..03cf98856c6f04e19956c4423dc5fa56aed46993 100644
--- a/content/browser/browser_process_sub_thread.cc
+++ b/content/browser/browser_process_sub_thread.cc
@@ -9,7 +9,6 @@
 #include "base/trace_event/memory_dump_manager.h"
 #include "build/build_config.h"
 #include "content/browser/browser_child_process_host_impl.h"
-#include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/notification_service_impl.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request.h"
@@ -74,10 +73,6 @@ void BrowserProcessSubThread::IOThreadPreCleanUp() {
   // and delete the BrowserChildProcessHost instances to release whatever
   // IO thread only resources they are referencing.
   BrowserChildProcessHostImpl::TerminateAll();
-
-  // Unregister GpuMemoryBuffer dump provider before IO thread is shut down.
-  base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
-      BrowserGpuMemoryBufferManager::current());
 }
 
 }  // namespace content