Add a field platform_private_footprint_ to ProcessMemoryTotals.

base/process/process_metrics_mac.cc

Index: base/process/process_metrics_mac.cc
diff --git a/base/process/process_metrics_mac.cc b/base/process/process_metrics_mac.cc
index 1481f7717f4a2b2fb490063d80a66b0da12db2cf..becd5557ab4285c990e8aba175e1f52855296261 100644
--- a/base/process/process_metrics_mac.cc
+++ b/base/process/process_metrics_mac.cc
@@ -337,6 +337,17 @@ size_t ProcessMetrics::GetPhysicalFootprint() const {
   return task_vm_info.phys_footprint;
 }
 
+size_t GetInternalAndCompressed() const {

[Primiano Tucci (use gerrit), 2017/04/25 12:43:35]

+ProcessMetrics::

+  task_vm_info info;
+  mach_msg_type_number_t count = TASK_VM_INFO_COUNT;
+  kern_return_t result =
+      task_info(TaskForPid(process_), TASK_VM_INFO,
+                reinterpret_cast<task_info_t>(&info), &count);
+  if (result != KERN_SUCCESS)
+    return 0;
+  return task_vm_info.internal + task_vm_info.compressed;
+}
+
 #define TIME_VALUE_TO_TIMEVAL(a, r) do {  \
   (r)->tv_sec = (a)->seconds;             \
   (r)->tv_usec = (a)->microseconds;       \