Make nanobench and dm be usable from Chromium build

dm/DM.cpp

 // 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"
 #include "SkGraphics.h"
 #include "SkOSFile.h"
 #include "SkPicture.h"
 #include "SkString.h"
 #include "SkTaskGroup.h"
 #include "Test.h"
 #include "gm.h"
@@ skipping 165 matching lines @@
 template <typename T, typename Registry>
 static void append_matching_factories(Registry* head, SkTDArray<typename Registry::Factory>* out) {
     for (const Registry* reg = head; reg != NULL; reg = reg->next()) {
         SkAutoTDelete<T> forName(reg->factory()(NULL));
         if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, forName->getName())) {
             *out->append() = reg->factory();
         }
     }
 }
 
-int dm_main();
 int dm_main() {
-    SetupCrashHandler();
     SkAutoGraphics ag;
     SkTaskGroup::Enabler enabled(FLAGS_threads);
 
     if (FLAGS_dryRun || FLAGS_veryVerbose) {
         FLAGS_verbose = true;
     }
 #if SK_ENABLE_INST_COUNT
     gPrintInstCount = FLAGS_leaks;
 #endif
 
@@ skipping 34 matching lines @@
     if (FLAGS_portableFonts && FLAGS_reportUsedChars) {
         sk_tool_utils::report_used_chars();
     }
 #endif
 
     SkTArray<SkString> failures;
     reporter.getFailures(&failures);
     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