Test for power of two safely

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

Index: third_party/WebKit/Source/platform/audio/AudioUtilities.h
diff --git a/third_party/WebKit/Source/platform/audio/AudioUtilities.h b/third_party/WebKit/Source/platform/audio/AudioUtilities.h
index ccb70083ff9cf98940639fcf5c9a368416e20fa3..8844ff84853bacd1809453c8dcda8181bdca73b7 100644
--- a/third_party/WebKit/Source/platform/audio/AudioUtilities.h
+++ b/third_party/WebKit/Source/platform/audio/AudioUtilities.h
@@ -57,6 +57,10 @@ PLATFORM_EXPORT bool isValidAudioBufferSampleRate(float sampleRate);
 // Return max/min sample rate supported by AudioBuffers.
 PLATFORM_EXPORT float minAudioBufferSampleRate();
 PLATFORM_EXPORT float maxAudioBufferSampleRate();
+
+// Check to see if x is a power of two.  If x == 0, returns false.
+PLATFORM_EXPORT bool isPowerOfTwo(size_t x);
+
 }  // namespace AudioUtilities
 }  // namespace blink