Add BACKGROUND dump mode to various GPU/CC MemoryDumpProviders

gpu/command_buffer/client/gles2_implementation.cc

Index: gpu/command_buffer/client/gles2_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index bf418249393e8cd9c5a5f62dcfa82160332b6edb..69975fdf815261fe2250b47a392c466e44ed261a 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -434,6 +434,9 @@ void GLES2Implementation::SetAggressivelyFreeResources(
 bool GLES2Implementation::OnMemoryDump(
     const base::trace_event::MemoryDumpArgs& args,
     base::trace_event::ProcessMemoryDump* pmd) {
+  using base::trace_event::MemoryAllocatorDump;
+  using base::trace_event::MemoryDumpLevelOfDetail;
+
   if (!transfer_buffer_->HaveBuffer())
     return true;
 
@@ -441,20 +444,21 @@ bool GLES2Implementation::OnMemoryDump(
       base::trace_event::MemoryDumpManager::GetInstance()
           ->GetTracingProcessId();
 
-  base::trace_event::MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(
-      base::StringPrintf("gpu/transfer_buffer_memory/buffer_%d",
-                         transfer_buffer_->GetShmId()));
-  dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
-                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+  MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(base::StringPrintf(
+      "gpu/transfer_buffer_memory/buffer_%d", transfer_buffer_->GetShmId()));
+  dump->AddScalar(MemoryAllocatorDump::kNameSize,
+                  MemoryAllocatorDump::kUnitsBytes,
                   transfer_buffer_->GetSize());
-  dump->AddScalar("free_size",
-                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
-                  transfer_buffer_->GetFreeSize());
-  auto guid =
-      GetBufferGUIDForTracing(tracing_process_id, transfer_buffer_->GetShmId());
-  const int kImportance = 2;
-  pmd->CreateSharedGlobalAllocatorDump(guid);
-  pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
+
+  if (args.level_of_detail != MemoryDumpLevelOfDetail::BACKGROUND) {
+    dump->AddScalar("free_size", MemoryAllocatorDump::kUnitsBytes,
+                    transfer_buffer_->GetFreeSize());
+    auto guid = GetBufferGUIDForTracing(tracing_process_id,
+                                        transfer_buffer_->GetShmId());
+    const int kImportance = 2;
+    pmd->CreateSharedGlobalAllocatorDump(guid);
+    pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
+  }
 
   return true;
 }