Add a linear interpolation resampler.

services/media/audio/platform/generic/mixers/linear_sampler.h

Index: services/media/audio/platform/generic/mixers/linear_sampler.h
diff --git a/services/media/audio/platform/generic/mixers/point_sampler.h b/services/media/audio/platform/generic/mixers/linear_sampler.h
similarity index 67%
copy from services/media/audio/platform/generic/mixers/point_sampler.h
copy to services/media/audio/platform/generic/mixers/linear_sampler.h
index f7244a6f97240cc8854af02ae50e82297b0aec3b..44724e2cb82a7054512a4769d788c4db54dd5790 100644
--- a/services/media/audio/platform/generic/mixers/point_sampler.h
+++ b/services/media/audio/platform/generic/mixers/linear_sampler.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SERVICES_MEDIA_AUDIO_PLATFORM_GENERIC_MIXERS_POINT_SAMPLER_H_
-#define SERVICES_MEDIA_AUDIO_PLATFORM_GENERIC_MIXERS_POINT_SAMPLER_H_
+#ifndef SERVICES_MEDIA_AUDIO_PLATFORM_GENERIC_MIXERS_LINEAR_SAMPLER_H_
+#define SERVICES_MEDIA_AUDIO_PLATFORM_GENERIC_MIXERS_LINEAR_SAMPLER_H_
 
 #include "mojo/services/media/common/interfaces/media_types.mojom.h"
 #include "services/media/audio/platform/generic/mixer.h"
@@ -13,13 +13,13 @@ namespace media {
 namespace audio {
 namespace mixers {
 
-class PointSampler : public Mixer {
+class LinearSampler : public Mixer {
  public:
   static MixerPtr Select(const LpcmMediaTypeDetailsPtr& src_format,
                          const LpcmMediaTypeDetailsPtr& dst_format);
 
  protected:
-  PointSampler(uint32_t pos_filter_width, uint32_t neg_filter_width)
+  LinearSampler(uint32_t pos_filter_width, uint32_t neg_filter_width)
     : Mixer(pos_filter_width, neg_filter_width) {}
 };
 
@@ -28,4 +28,4 @@ class PointSampler : public Mixer {
 }  // namespace media
 }  // namespace mojo
 
-#endif  // SERVICES_MEDIA_AUDIO_PLATFORM_GENERIC_MIXERS_POINT_SAMPLER_H_
+#endif  // SERVICES_MEDIA_AUDIO_PLATFORM_GENERIC_MIXERS_LINEAR_SAMPLER_H_