Add a field platform_private_footprint_ to ProcessMemoryTotals.

base/process/process_metrics.h

Index: base/process/process_metrics.h
diff --git a/base/process/process_metrics.h b/base/process/process_metrics.h
index 2652bef85e519bb7d4bb6296846db6c4b7e8cbfe..e756781b80e9e4a37a10ac3b6345477b6154638a 100644
--- a/base/process/process_metrics.h
+++ b/base/process/process_metrics.h
@@ -168,6 +168,10 @@ class BASE_EXPORT ProcessMetrics {
   // measurement was unavailable.
   size_t GetPhysicalFootprint() const;
 
+  // Returns the sum of internal and compressed memory. This measures anonymous,
+  // non-discardable memory, excluding IOKit.
+  size_t GetInternalAndCompressed() const;

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

Not an owner here but I guess an "unit" in the name somehow would be nice, like,
dunno
GetInternalAndCompressedBytes()
GetInternalAndCompressedMemory()

(or maybe could be just an extra optional output argument of GetMemoryBytes
below?)

+
   // Returns private, shared, and total resident bytes. |locked_bytes| refers to
   // bytes that must stay resident. |locked_bytes| only counts bytes locked by
   // this task, not bytes locked by the kernel.