Bug 1204195 - Fix two warnings in dom/media/webaudio/blink/. r=rillian.

They were both "truncation from 'double' to 'float'" warnings.

This also allows the COMPILER_ALLOW_WARNINGS=True flag to be removed.

--HG--
extra : rebase_source : 4b57cba0d994671d5218be94d8f838582496ac1c

dom/media/webaudio/blink/DynamicsCompressorKernel.cpp

@@ -167,7 +167,7 @@ float DynamicsCompressorKernel::kAtSlope(float desiredSlope)
     float x = WebAudioUtils::ConvertDecibelsToLinear(xDb);
 
     // Approximate k given initial values.
-    float minK = 0.1;
+    float minK = 0.1f;
     float maxK = 10000;
     float k = 5;
 

dom/media/webaudio/blink/PeriodicWave.cpp

@@ -237,7 +237,7 @@ void PeriodicWave::createBandLimitedTables(const float* realData, const float* i
 
 void PeriodicWave::generateBasicWaveform(OscillatorType shape)
 {
-    const float piFloat = M_PI;
+    const float piFloat = float(M_PI);
     unsigned fftSize = periodicWaveSize();
     unsigned halfSize = fftSize / 2;
 

dom/media/webaudio/blink/moz.build

@@ -30,6 +30,3 @@ FINAL_LIBRARY = 'xul'
 LOCAL_INCLUDES += [
     '/dom/media/webaudio',
 ]
-
-if not CONFIG['GNU_CXX']:
-    ALLOW_COMPILER_WARNINGS = True