[Merge to 3071] Add the UMA metric Memory.Gpu.PhysicalFootprint.MacOS

chrome/browser/memory_details.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 "chrome/browser/memory_details.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 78 matching lines @@
     return GetRendererTypeNameInEnglish(rtype);
   return content::GetProcessTypeNameInEnglish(process_type);
 }
 
 ProcessMemoryInformation::ProcessMemoryInformation()
     : pid(0),
       num_processes(0),
       process_type(content::PROCESS_TYPE_UNKNOWN),
       num_open_fds(-1),
       open_fds_soft_limit(-1),
-      renderer_type(RENDERER_UNKNOWN) {}
+      renderer_type(RENDERER_UNKNOWN),
+      phys_footprint(0) {}
 
 ProcessMemoryInformation::ProcessMemoryInformation(
     const ProcessMemoryInformation& other) = default;
 
 ProcessMemoryInformation::~ProcessMemoryInformation() {}
 
 bool ProcessMemoryInformation::operator<(
     const ProcessMemoryInformation& rhs) const {
   return working_set.priv < rhs.working_set.priv;
 }
@@ skipping 243 matching lines @@
   // Get rid of other Chrome processes that are from a different profile.
   auto is_unknown = [](ProcessMemoryInformation& process) {
     return process.process_type == content::PROCESS_TYPE_UNKNOWN;
   };
   auto& vector = chrome_browser->processes;
   vector.erase(std::remove_if(vector.begin(), vector.end(), is_unknown),
                vector.end());
 
   OnDetailsAvailable();
 }