DM: expand peak RAM usage to Mac and Android too.

dm/DMReporter.cpp

 #include "DMReporter.h"
 
 #include "SkDynamicAnnotations.h"
 #include "SkCommonFlags.h"
 #include "OverwriteLine.h"
 
-#ifdef SK_BUILD_FOR_UNIX
+#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);
-        return ru.ru_maxrss;
+    #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 {
 
 void Reporter::printStatus(SkString name, SkMSec timeMs) const {
     if (FLAGS_quiet) {
         return;
@@ skipping 23 matching lines @@
     SkAutoMutexAcquire writer(&fMutex);
     fFailures.push_back(msg);
 }
 
 void Reporter::getFailures(SkTArray<SkString>* failures) const {
     SkAutoMutexAcquire reader(&fMutex);
     *failures = fFailures;
 }
 
 }  // namespace DM