Revert of Add BACKGROUND dump mode to various GPU/CC MemoryDumpProviders

gpu/command_buffer/service/buffer_manager.cc

Index: gpu/command_buffer/service/buffer_manager.cc
diff --git a/gpu/command_buffer/service/buffer_manager.cc b/gpu/command_buffer/service/buffer_manager.cc
index 68a85bccf4e5bb822f67319e994e57fbd299180b..e1a2171e1bd122f16e261b7a66fe072f1464f9b1 100644
--- a/gpu/command_buffer/service/buffer_manager.cc
+++ b/gpu/command_buffer/service/buffer_manager.cc
@@ -734,21 +734,6 @@
 
 bool BufferManager::OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
                                  base::trace_event::ProcessMemoryDump* pmd) {
-  using base::trace_event::MemoryAllocatorDump;
-  using base::trace_event::MemoryDumpLevelOfDetail;
-
-  if (args.level_of_detail == MemoryDumpLevelOfDetail::BACKGROUND) {
-    std::string dump_name =
-        base::StringPrintf("gpu/gl/buffers/share_group_%" PRIu64 "",
-                           memory_tracker_->ShareGroupTracingGUID());
-    MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
-    dump->AddScalar(MemoryAllocatorDump::kNameSize,
-                    MemoryAllocatorDump::kUnitsBytes, mem_represented());
-
-    // Early out, no need for more detail in a BACKGROUND dump.
-    return true;
-  }
-
   const uint64_t share_group_tracing_guid =
       memory_tracker_->ShareGroupTracingGUID();
   for (const auto& buffer_entry : buffers_) {
@@ -758,9 +743,10 @@
     std::string dump_name =
         base::StringPrintf("gpu/gl/buffers/share_group_%" PRIu64 "/buffer_%d",
                            share_group_tracing_guid, client_buffer_id);
-    MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
-    dump->AddScalar(MemoryAllocatorDump::kNameSize,
-                    MemoryAllocatorDump::kUnitsBytes,
+    base::trace_event::MemoryAllocatorDump* dump =
+        pmd->CreateAllocatorDump(dump_name);
+    dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                    base::trace_event::MemoryAllocatorDump::kUnitsBytes,
                     static_cast<uint64_t>(buffer->size()));
 
     auto guid = gl::GetGLBufferGUIDForTracing(share_group_tracing_guid,
@@ -768,7 +754,6 @@
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid);
   }
-
   return true;
 }