Revert of Process Statistics header, add max RSS to render_pdfs

dm/DMReporter.cpp

Index: dm/DMReporter.cpp
diff --git a/dm/DMReporter.cpp b/dm/DMReporter.cpp
index 12bcfac0f3f7f233b5a7ebc780f75813ece9f536..14f50871021ea42e811e547fc452b48089c2f300 100644
--- a/dm/DMReporter.cpp
+++ b/dm/DMReporter.cpp
@@ -3,7 +3,21 @@
 #include "SkDynamicAnnotations.h"
 #include "SkCommonFlags.h"
 #include "OverwriteLine.h"
-#include "ProcStats.h"
+
+#if defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_ANDROID)
+    #include <sys/resource.h>
+    static long get_max_rss_kb() {
+        struct rusage ru;
+        getrusage(RUSAGE_SELF, &ru);
+    #if defined(SK_BUILD_FOR_MAC)
+        return ru.ru_maxrss / 1024;  // Darwin reports bytes.
+    #else
+        return ru.ru_maxrss;         // Linux reports kilobytes.
+    #endif
+    }
+#else
+    static long get_max_rss_kb() { return 0; }
+#endif
 
 namespace DM {
 
@@ -22,9 +36,8 @@
         status.appendf(", %d failed", failed);
     }
     if (FLAGS_verbose) {
-        int max_rss_kb = sk_tools::getMaxResidentSetSizeKB();
-        if (max_rss_kb >= 0) {
-            status.appendf("\t%4dM peak", max_rss_kb / 1024);
+        if (long max_rss_kb = get_max_rss_kb()) {
+            status.appendf("\t%4ldM peak", max_rss_kb / 1024);
         }
         status.appendf("\t%5dms\t%s", timeMs, name.c_str());
     }