Don't clip FFT output values to minDecibels.

third_party/WebKit/Source/platform/audio/AudioUtilities.cpp

Index: third_party/WebKit/Source/platform/audio/AudioUtilities.cpp
diff --git a/third_party/WebKit/Source/platform/audio/AudioUtilities.cpp b/third_party/WebKit/Source/platform/audio/AudioUtilities.cpp
index e716d6ca6566fea465d5dbd84f916ff8b42f0f91..f162c6be9079d852a87351ac80e4471417bbf4e3 100644
--- a/third_party/WebKit/Source/platform/audio/AudioUtilities.cpp
+++ b/third_party/WebKit/Source/platform/audio/AudioUtilities.cpp
@@ -37,11 +37,7 @@ float decibelsToLinear(float decibels)
 
 float linearToDecibels(float linear)
 {
-    // It's not possible to calculate decibels for a zero linear value since it would be -Inf.
-    // -1000.0 dB represents a very tiny linear value in case we ever reach this case.
-    ASSERT(linear);
-    if (!linear)
-        return -1000;
+    ASSERT(linear >= 0);
 
     return 20 * log10f(linear);
 }