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 0c685232ad70edc34c976f563dc004df972a55a2..12d97eaa2b18b8dccb446e202966ad4d5dfce706 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",
@@ -1694,6 +1692,7 @@ test("blink_platform_unittests") {
     "animation/CompositorAnimationTimelineTest.cpp",
     "animation/CompositorFloatAnimationCurveTest.cpp",
     "animation/TimingFunctionTest.cpp",
+    "audio/PushPullFIFOTest.cpp",
     "blob/BlobDataTest.cpp",
     "clipboard/ClipboardUtilitiesTest.cpp",
     "exported/FilePathConversionTest.cpp",