Add SafeClamp(), which accepts args of different types

webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc

Index: webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc
diff --git a/webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc b/webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc
index 4560958bfd0ef350e46d97a5a3ddcb34484627d0..2ecbc4d1bedcb52efee616f9dadbb1effa8ef9cf 100644
--- a/webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc
+++ b/webrtc/modules/audio_processing/aec3/adaptive_fir_filter_unittest.cc
@@ -20,6 +20,7 @@
 #endif
 #include "webrtc/base/arraysize.h"
 #include "webrtc/base/random.h"
+#include "webrtc/base/safe_minmax.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
 #include "webrtc/modules/audio_processing/aec3/aec_state.h"
 #include "webrtc/modules/audio_processing/aec3/cascaded_biquad_filter.h"
@@ -351,7 +352,7 @@ TEST(AdaptiveFirFilter, FilterAndAdapt) {
       std::transform(y.begin(), y.end(), s.begin() + kFftLengthBy2, e.begin(),
                      [&](float a, float b) { return a - b * kScale; });
       std::for_each(e.begin(), e.end(), [](float& a) {
-        a = std::max(std::min(a, 32767.0f), -32768.0f);
+        a = rtc::SafeClamp<float>(a, -32768.f, 32767.f);

[ossu, 2017/06/12 12:21:36]

Why does this one need an explicit return type? Looks to me three floats in
should lead to a float out.

[kwiberg-webrtc, 2017/06/12 17:28:12]

Done.

       });
       fft.ZeroPaddedFft(e, &E);