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

gpu/command_buffer/client/cmd_buffer_helper.cc

Index: gpu/command_buffer/client/cmd_buffer_helper.cc
diff --git a/gpu/command_buffer/client/cmd_buffer_helper.cc b/gpu/command_buffer/client/cmd_buffer_helper.cc
index 0304b8f7e5d1ae6d4322bdd889729477746a822c..e08c78c03cf8dcaa37c5991e28bbd4bbe8b02a5e 100644
--- a/gpu/command_buffer/client/cmd_buffer_helper.cc
+++ b/gpu/command_buffer/client/cmd_buffer_helper.cc
@@ -340,9 +340,6 @@
 bool CommandBufferHelper::OnMemoryDump(
     const base::trace_event::MemoryDumpArgs& args,
     base::trace_event::ProcessMemoryDump* pmd) {
-  using base::trace_event::MemoryAllocatorDump;
-  using base::trace_event::MemoryDumpLevelOfDetail;
-
   if (!HaveRingBuffer())
     return true;
 
@@ -350,20 +347,19 @@
       base::trace_event::MemoryDumpManager::GetInstance()
           ->GetTracingProcessId();
 
-  MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(base::StringPrintf(
-      "gpu/command_buffer_memory/buffer_%d", ring_buffer_id_));
-  dump->AddScalar(MemoryAllocatorDump::kNameSize,
-                  MemoryAllocatorDump::kUnitsBytes, ring_buffer_size_);
-
-  if (args.level_of_detail != MemoryDumpLevelOfDetail::BACKGROUND) {
-    dump->AddScalar(
-        "free_size", MemoryAllocatorDump::kUnitsBytes,
-        GetTotalFreeEntriesNoWaiting() * sizeof(CommandBufferEntry));
-    auto guid = GetBufferGUIDForTracing(tracing_process_id, ring_buffer_id_);
-    const int kImportance = 2;
-    pmd->CreateSharedGlobalAllocatorDump(guid);
-    pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
-  }
+  base::trace_event::MemoryAllocatorDump* dump =
+      pmd->CreateAllocatorDump(base::StringPrintf(
+          "gpu/command_buffer_memory/buffer_%d", ring_buffer_id_));
+  dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                  ring_buffer_size_);
+  dump->AddScalar("free_size",
+                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                  GetTotalFreeEntriesNoWaiting() * sizeof(CommandBufferEntry));
+  auto guid = GetBufferGUIDForTracing(tracing_process_id, ring_buffer_id_);
+  const int kImportance = 2;
+  pmd->CreateSharedGlobalAllocatorDump(guid);
+  pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
 
   return true;
 }