Move malloc/partition_alloc memory usage functions to base

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 b1f52cadbe2a7da8ab7160485ea1d30e21499b0b..500b6c1c4730bfded45f4f8fbbd0a55480007a28 100644
--- a/base/process/process_metrics.h
+++ b/base/process/process_metrics.h
@@ -543,6 +543,12 @@ BASE_EXPORT MachVMRegionResult GetBasicInfo(mach_port_t task,
                                             vm_region_basic_info_64* info);
 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 
+// Returns total memory usage of malloc.
+BASE_EXPORT size_t GetMallocUsage();

[Primiano Tucci (use gerrit), 2017/06/14 12:10:32]

I defer this to mark@ but just pointing out that  the other functions here seem
to be member functions. I'd probably make them such just for consistency even if
I realize that there is no functional requirement.

I think this all comes from the fact that one can get a  ProcessMetrics for
another process. But then if you look at the actual code, most of these
functions don't even look at process_; and always assume that proces_ == local.

[keishi, 2017/06/14 13:21:39]

Done.

+
+// Returns total memory usage of partition alloc.
+BASE_EXPORT size_t GetPartitionAllocUsage();
+
 }  // namespace base
 
 #endif  // BASE_PROCESS_PROCESS_METRICS_H_