AnalyserNode should downmix channels to mono.

third_party/WebKit/LayoutTests/webaudio/realtimeanalyser-downmix-expected.txt

Index: third_party/WebKit/LayoutTests/webaudio/realtimeanalyser-downmix-expected.txt
diff --git a/third_party/WebKit/LayoutTests/webaudio/realtimeanalyser-downmix-expected.txt b/third_party/WebKit/LayoutTests/webaudio/realtimeanalyser-downmix-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6e4a587ca7a8b455d7c9446ab0b7fc4fec4431ca
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/webaudio/realtimeanalyser-downmix-expected.txt
@@ -0,0 +1,29 @@
+Test AnalyserNode Downmixing
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS Analyser downmix mono to mono time data is identical to the array [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,...].
+PASS Analyser downmix mono to mono freq data equals [-7.53501,-12.0412,-27.9588,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,...] with an element-wise tolerance of {absoluteThreshold: 0, relativeThreshold: 6.3283e-8}.
+PASS Analyser downmix mono to mono downmixed correctly.
+
+PASS Analyser downmix stereo to mono time data is identical to the array [2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,2.5,...].
+PASS Analyser downmix stereo to mono freq data equals [0.423786,-4.08240,-20.0000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,...] with an element-wise tolerance of {absoluteThreshold: 0, relativeThreshold: 1.1681e-7}.
+PASS Analyser downmix stereo to mono downmixed correctly.
+
+PASS Analyser downmix quad to mono time data is identical to the array [7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,7.5,...].
+PASS Analyser downmix quad to mono freq data equals [9.96621,5.46002,-10.4576,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,...] with an element-wise tolerance of {absoluteThreshold: 0, relativeThreshold: 4.9793e-7}.
+PASS Analyser downmix quad to mono downmixed correctly.
+
+PASS Analyser downmix 5.1 to mono time data is identical to the array [43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,43.0355339050293,...].
+PASS Analyser downmix 5.1 to mono freq data equals [25.1415,20.6353,4.71774,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,...] with an element-wise tolerance of {absoluteThreshold: 0, relativeThreshold: 2.0215e-7}.
+PASS Analyser downmix 5.1 to mono downmixed correctly.
+
+PASS Analyser downmix 3-channel to mono time data is identical to the array [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,...].
+PASS Analyser downmix 3-channel to mono freq data equals [-7.53501,-12.0412,-27.9588,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,-100.000,...] with an element-wise tolerance of {absoluteThreshold: 0, relativeThreshold: 6.3283e-8}.
+PASS Analyser downmix 3-channel to mono downmixed correctly.
+
+PASS successfullyParsed is true
+
+TEST COMPLETE
+