Allocator cleanup: remove CHROME_PROFILER_TIME and rotten tcmalloc deps

content/child/content_child_helpers.cc

Index: content/child/content_child_helpers.cc
diff --git a/content/child/content_child_helpers.cc b/content/child/content_child_helpers.cc
index 4398bc067ae694eb5815a446f2dacbe1b873696c..66775a2d5696159b9a0d0ebd72f8bea8da21adf1 100644
--- a/content/child/content_child_helpers.cc
+++ b/content/child/content_child_helpers.cc
@@ -18,6 +18,12 @@
 
 namespace content {
 
+// TODO(primiano): get rid of this file together with --memory-metrics.
+// This function is both misplaced and misnamed. If useful, this should
+// be moved to base/process/process_metrics.h. Regardless the name,
+// though, this provides only a partial and misleading value.
+// Unfortunately some telemetry benchmark rely on it and these need to
+// be refactored before getting rid of this. See crbug.com/581365 .
 #if defined(OS_LINUX) || defined(OS_ANDROID)
 size_t GetMemoryUsageKB() {
   struct mallinfo minfo = mallinfo();