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 6c36e04058b771ef930b2440d15eb9a253514aff..d053681f6c8d8d3d638c03bb7da8d3604b676690 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -405,14 +405,10 @@ component("platform") {
     "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",
@@ -459,6 +455,8 @@ component("platform") {
     "audio/MultiChannelResampler.h",
     "audio/Panner.cpp",
     "audio/Panner.h",
+    "audio/PushPullFIFO.cpp",
+    "audio/PushPullFIFO.h",
     "audio/Reverb.cpp",
     "audio/Reverb.h",
     "audio/ReverbAccumulationBuffer.cpp",
@@ -1699,6 +1697,7 @@ test("blink_platform_unittests") {
     "animation/CompositorAnimationTimelineTest.cpp",
     "animation/CompositorFloatAnimationCurveTest.cpp",
     "animation/TimingFunctionTest.cpp",
+    "audio/PushPullFIFOTest.cpp",
     "blob/BlobDataTest.cpp",
     "exported/FilePathConversionTest.cpp",
     "exported/WebStringTest.cpp",