quipper: Restore perf_converter to buildable state.

Add DCHECK to mybase, and add scoped_temp_path.cc to Makefile.external.

BUG=chromium:378921
TEST=make -f Makefile.external perf_converter

Change-Id: I8e488ff3624eb974c8f6246a35fea8d26ec9e9ac
Reviewed-on: https://chromium-review.googlesource.com/202516
Reviewed-by: Simon Que <sque@chromium.org>
Tested-by: David Sharp <dhsharp@chromium.org>
Commit-Queue: David Sharp <dhsharp@chromium.org>
diff --git a/Makefile.external b/Makefile.external
index 534e6a6..f493d30 100644
--- a/Makefile.external
+++ b/Makefile.external
@@ -26,7 +26,7 @@
 
 COMMON_SOURCES = utils.cc perf_reader.cc perf_parser.cc perf_serializer.cc \
 		 address_mapper.cc perf_protobuf_io.cc perf_recorder.cc \
-		 conversion_utils.cc \
+		 conversion_utils.cc scoped_temp_path.cc \
 		 $(GENERATED_SOURCES)
 COMMON_OBJECTS = $(COMMON_SOURCES:.cc=.o)
 TEST_COMMON_SOURCES = test_utils.cc test_utils_defs.cc
diff --git a/mybase/base/logging.h b/mybase/base/logging.h
index f5e64e2..aa15751 100644
--- a/mybase/base/logging.h
+++ b/mybase/base/logging.h
@@ -58,5 +58,6 @@
                                                 << "failed"
 #define DLOG(x) LOG(x)
 #define VLOG(x) LOG(x)
+#define DCHECK(x) CHECK(x)
 
 #endif  // BASE_LOGGING_H_