Add BACKGROUND dump mode to various GPU/CC MemoryDumpProviders

gpu/command_buffer/service/buffer_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/buffer_manager.h"
 
 #include <stdint.h>
 
 #include <limits>
 
@@ skipping 716 matching lines @@
       break;
   }
   if (primitive_restart_fixed_index_ != index) {
     glPrimitiveRestartIndex(index);
     primitive_restart_fixed_index_ = index;
   }
 }
 
 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_) {
     const auto& client_buffer_id = buffer_entry.first;
     const auto& buffer = buffer_entry.second;
 
     std::string dump_name =
         base::StringPrintf("gpu/gl/buffers/share_group_%" PRIu64 "/buffer_%d",
                            share_group_tracing_guid, client_buffer_id);
-    base::trace_event::MemoryAllocatorDump* dump =
-        pmd->CreateAllocatorDump(dump_name);
-    dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
-                    base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+    MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
+    dump->AddScalar(MemoryAllocatorDump::kNameSize,
+                    MemoryAllocatorDump::kUnitsBytes,
                     static_cast<uint64_t>(buffer->size()));
 
     auto guid = gl::GetGLBufferGUIDForTracing(share_group_tracing_guid,
                                               client_buffer_id);
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid);
   }
+
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu