Add MDP for TabRestorer.

components/sessions/core/tab_restore_service_helper.cc

 // Copyright 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 "components/sessions/core/tab_restore_service_helper.h"
 
+#include <inttypes.h>
 #include <stddef.h>
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
+#include "base/strings/stringprintf.h"
+#include "base/trace_event/estimate_memory_usage.h"
+#include "base/trace_event/memory_dump_manager.h"
+#include "base/trace_event/process_memory_dump.h"
 #include "components/sessions/core/live_tab.h"
 #include "components/sessions/core/live_tab_context.h"
 #include "components/sessions/core/serialized_navigation_entry.h"
 #include "components/sessions/core/session_types.h"
 #include "components/sessions/core/tab_restore_service_client.h"
 #include "components/sessions/core/tab_restore_service_observer.h"
 
 namespace sessions {
 
 // TabRestoreServiceHelper::Observer -------------------------------------------
@@ skipping 294 matching lines @@
       for (const auto& tab : window.tabs) {
         if (tab->id == id) {
           return i;
         }
       }
     }
   }
   return entries_.end();
 }
 
+bool TabRestoreServiceHelper::OnMemoryDump(
+    const base::trace_event::MemoryDumpArgs& args,
+    base::trace_event::ProcessMemoryDump* pmd) {
+  using base::trace_event::EstimateMemoryUsage;
+  size_t memory_usage = EstimateMemoryUsage(entries_);
+
+  std::string dump_name = base::StringPrintf(
+      "tab_restore/0x%" PRIXPTR, reinterpret_cast<uintptr_t>(this));
+  auto* dump = pmd->CreateAllocatorDump(dump_name);
+  dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                  base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                  memory_usage);
+  const char* system_allocator_name =
+      base::trace_event::MemoryDumpManager::GetInstance()
+          ->system_allocator_pool_name();
+  if (system_allocator_name) {
+    pmd->AddSuballocation(dump->guid(), system_allocator_name);
+  }
+
+  return true;
+}
+
 // static
 bool TabRestoreServiceHelper::ValidateEntry(const Entry& entry) {
   switch (entry.type) {
     case TabRestoreService::TAB:
       return ValidateTab(static_cast<const Tab&>(entry));
     case TabRestoreService::WINDOW:
       return ValidateWindow(static_cast<const Window&>(entry));
   }
   NOTREACHED();
   return false;
@@ skipping 148 matching lines @@
         tab.browser_id = new_id;
     }
   }
 }
 
 base::Time TabRestoreServiceHelper::TimeNow() const {
   return time_factory_ ? time_factory_->TimeNow() : base::Time::Now();
 }
 
 }  // namespace sessions