DM: wire up --leaks / -l again

dm/DM.cpp

 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
 #include "OverwriteLine.h"
 #include "ProcStats.h"
 #include "SkBBHFactory.h"
 #include "SkChecksum.h"
 #include "SkCommonFlags.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
+#include "SkInstCnt.h"
 #include "SkMD5.h"
 #include "SkOSFile.h"
 #include "SkTDynamicHash.h"
 #include "SkTaskGroup.h"
 #include "Test.h"
 #include "Timer.h"
 
 DEFINE_string(images, "resources", "Images to decode.");
 DEFINE_string(src, "tests gm skp image subset", "Source types to test.");
 DEFINE_bool(nameByHash, false,
@@ skipping 462 matching lines @@
     for (int i = 0; i < gGPUTests.count(); i++) {
         run_test(&gGPUTests[i]);
     }
 }
 
 int dm_main();
 int dm_main() {
     SetupCrashHandler();
     SkAutoGraphics ag;
     SkTaskGroup::Enabler enabled(FLAGS_threads);
+    if (FLAGS_leaks) {
+        SkInstCountPrintLeaksOnExit();
+    }
 
     gather_gold();
 
     gather_srcs();
     gather_sinks();
     gather_tests();
 
     gPending = gSrcs.count() * gSinks.count() + gThreadedTests.count() + gGPUTests.count();
     SkDebugf("%d srcs * %d sinks + %d tests == %d tasks\n",
              gSrcs.count(), gSinks.count(), gThreadedTests.count() + gGPUTests.count(), gPending);
@@ skipping 42 matching lines @@
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif