Change name of method from GetRSS -> GetResidentSetSize.

Bug: 819289
Change-Id: I029d5adfef0a650998778c1b56ea8782a66ff3e2
Reviewed-on: https://chromium-review.googlesource.com/956573Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542283}

base/process/process_metrics.h

@@ -154,7 +154,7 @@ class BASE_EXPORT ProcessMetrics {
 #if defined(OS_LINUX) || defined(OS_ANDROID)
   // Resident Set Size is a Linux/Android specific memory concept. Do not
   // attempt to extend this to other platforms.
-  BASE_EXPORT size_t GetRSS() const;
+  BASE_EXPORT size_t GetResidentSetSize() const;
 #endif
 
 #if defined(OS_MACOSX)

base/process/process_metrics_linux.cc

@@ -211,7 +211,7 @@ std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
   return WrapUnique(new ProcessMetrics(process));
 }
 
-size_t ProcessMetrics::GetRSS() const {
+size_t ProcessMetrics::GetResidentSetSize() const {
   return internal::ReadProcStatsAndGetFieldAsSizeT(process_, internal::VM_RSS) *
       getpagesize();
 }

services/resource_coordinator/public/cpp/memory_instrumentation/os_metrics_linux.cc

@@ -200,7 +200,7 @@ bool OSMetrics::FillOSMemoryDump(base::ProcessId pid,
 
   dump->platform_private_footprint->rss_anon_bytes = rss_anon_bytes;
   dump->platform_private_footprint->vm_swap_bytes = vm_swap_bytes;
-  dump->resident_set_kb = process_metrics->GetRSS() / 1024;
+  dump->resident_set_kb = process_metrics->GetResidentSetSize() / 1024;
 
   return true;
 }