Add basic stacktrace handler using libunwind.

tools/bench_pictures_main.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "BenchTimer.h"
+#include "CrashHandler.h"
 #include "CopyTilesRenderer.h"
 #include "LazyDecodeBitmap.h"
 #include "PictureBenchmark.h"
 #include "PictureRenderingFlags.h"
 #include "SkBenchLogger.h"
 #include "SkCommandLineFlags.h"
 #include "SkData.h"
 #include "SkDiscardableMemoryPool.h"
 #include "SkGraphics.h"
 #include "SkImageDecoder.h"
@@ skipping 367 matching lines @@
     } else {
         SkString warning;
         warning.printf("Warning: skipping %s\n", input);
         gLogger.logError(warning);
     }
     return failures;
 }
 
 int tool_main(int argc, char** argv);
 int tool_main(int argc, char** argv) {
+    SetupCrashHandler();
     SkString usage;
     usage.printf("Time drawing .skp files.\n"
                  "\tPossible arguments for --filter: [%s]\n\t\t[%s]",
                  filterTypesUsage().c_str(), filterFlagsUsage().c_str());
     SkCommandLineFlags::SetUsage(usage.c_str());
     SkCommandLineFlags::Parse(argc, argv);
 
     if (FLAGS_repeat < 1) {
         SkString error;
         error.printf("--repeats must be >= 1. Was %i\n", FLAGS_repeat);
@@ skipping 52 matching lines @@
 #endif
     gWriter.end();
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif