Move UBSan warnings from a blacklist to the source

webrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_unittest.cc

Index: webrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_unittest.cc
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_unittest.cc b/webrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_unittest.cc
index ce96e2c6313553a479d4e0484acc72017527d6cb..c8e6ac87adbc2bf0bcb948ba47779ea9ee4587d3 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_unittest.cc
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_unittest.cc
@@ -12,6 +12,7 @@
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/filterbank_internal.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/filterbank_tables.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/settings.h"
+#include "webrtc/rtc_base/sanitizer.h"
 #include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/typedefs.h"
@@ -19,8 +20,9 @@
 class FilterBanksTest : public testing::Test {
  protected:
   // Pass a function pointer to the Tester function.
-  void CalculateResidualEnergyTester(AllpassFilter2FixDec16
-                                     AllpassFilter2FixDec16Function) {
+  void RTC_NO_SANITIZE("signed-integer-overflow")  // bugs.webrtc.org/5513
+  CalculateResidualEnergyTester(AllpassFilter2FixDec16
+                                AllpassFilter2FixDec16Function) {
     const int kSamples = QLOOKAHEAD;
     const int kState = 2;
     int16_t data_ch1[kSamples] = {0};
@@ -41,6 +43,7 @@ class FilterBanksTest : public testing::Test {
       sign *= -1;
       data_ch1[i] = sign * WEBRTC_SPL_WORD32_MAX / (i * i + 1);
       data_ch2[i] = sign * WEBRTC_SPL_WORD32_MIN / (i * i + 1);
+      // UBSan: -1 * -2147483648 cannot be represented in type 'int'
     };
 
     AllpassFilter2FixDec16Function(data_ch1,