Make nanobench and dm be usable from Chromium build

dm/DM.cpp

Index: dm/DM.cpp
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 52c86d5f6880dc6f79f0e759808ec1d021a84f07..08a458756f876eab57f9a037f2c10bd1dddda673 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -1,7 +1,6 @@
 // Main binary for DM.
 // For a high-level overview, please see dm/README.
 
-#include "CrashHandler.h"
 #include "LazyDecodeBitmap.h"
 #include "SkCommonFlags.h"
 #include "SkForceLinking.h"
@@ -187,9 +186,7 @@ static void append_matching_factories(Registry* head, SkTDArray<typename Registr
     }
 }
 
-int dm_main();
 int dm_main() {
-    SetupCrashHandler();
     SkAutoGraphics ag;
     SkTaskGroup::Enabler enabled(FLAGS_threads);
 
@@ -244,10 +241,3 @@ int dm_main() {
     report_failures(failures);
     return failures.count() > 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