Revert of Introduce PushPullFIFO class and remove other FIFOs

third_party/WebKit/Source/platform/BUILD.gn

Index: third_party/WebKit/Source/platform/BUILD.gn
diff --git a/third_party/WebKit/Source/platform/BUILD.gn b/third_party/WebKit/Source/platform/BUILD.gn
index 38dbfa54e5dcac26e766c8e4b686f01d89af2bf6..6176634d8b1ad12d2932bb012a1cfa18259b78b3 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -405,10 +405,14 @@
     "audio/AudioDestination.cpp",
     "audio/AudioDestination.h",
     "audio/AudioDestinationConsumer.h",
+    "audio/AudioFIFO.cpp",
+    "audio/AudioFIFO.h",
     "audio/AudioFileReader.h",
     "audio/AudioIOCallback.h",
     "audio/AudioProcessor.cpp",
     "audio/AudioProcessor.h",
+    "audio/AudioPullFIFO.cpp",
+    "audio/AudioPullFIFO.h",
     "audio/AudioResampler.cpp",
     "audio/AudioResampler.h",
     "audio/AudioResamplerKernel.cpp",
@@ -455,8 +459,6 @@
     "audio/MultiChannelResampler.h",
     "audio/Panner.cpp",
     "audio/Panner.h",
-    "audio/PushPullFIFO.cpp",
-    "audio/PushPullFIFO.h",
     "audio/Reverb.cpp",
     "audio/Reverb.h",
     "audio/ReverbAccumulationBuffer.cpp",
@@ -1699,7 +1701,6 @@
     "animation/CompositorAnimationTimelineTest.cpp",
     "animation/CompositorFloatAnimationCurveTest.cpp",
     "animation/TimingFunctionTest.cpp",
-    "audio/PushPullFIFOTest.cpp",
     "blob/BlobDataTest.cpp",
     "clipboard/ClipboardUtilitiesTest.cpp",
     "exported/FilePathConversionTest.cpp",