[tracing] Introduce MemoryDumpArgs to enable light and heavy dumps

content/common/host_shared_bitmap_manager.cc

 // Copyright 2013 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 "content/common/host_shared_bitmap_manager.h"
 
 #include "base/lazy_instance.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/trace_event/process_memory_dump.h"
@@ skipping 133 matching lines @@
   }
   if (!data->memory->memory()) {
     return scoped_ptr<cc::SharedBitmap>();
   }
 
   return make_scoped_ptr(new HostSharedBitmap(
       static_cast<uint8*>(data->memory->memory()), data, id, nullptr));
 }
 
 bool HostSharedBitmapManager::OnMemoryDump(
+    const base::trace_event::MemoryDumpArgs& args,
     base::trace_event::ProcessMemoryDump* pmd) {
   base::AutoLock lock(lock_);
 
   for (const auto& bitmap : handle_map_) {
     base::trace_event::MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(
         base::StringPrintf("%s/%s", kMemoryAllocatorName,
                            base::HexEncode(bitmap.first.name,
                                            sizeof(bitmap.first.name)).c_str()));
     if (!dump)
       return false;
@@ skipping 70 matching lines @@
   return handle_map_.size();
 }
 
 void HostSharedBitmapManager::FreeSharedMemoryFromMap(
     const cc::SharedBitmapId& id) {
   base::AutoLock lock(lock_);
   handle_map_.erase(id);
 }
 
 }  // namespace content