Move utility functions for sample rate to AudioUtilities.

Source/modules/webaudio/OfflineAudioContext.cpp

Index: Source/modules/webaudio/OfflineAudioContext.cpp
diff --git a/Source/modules/webaudio/OfflineAudioContext.cpp b/Source/modules/webaudio/OfflineAudioContext.cpp
index 8005392a8a7e992abad98516ec8253aa45ac0f82..d24ae2afa3bc44823ba5e9c3349fa364392745d0 100644
--- a/Source/modules/webaudio/OfflineAudioContext.cpp
+++ b/Source/modules/webaudio/OfflineAudioContext.cpp
@@ -33,6 +33,7 @@
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
+#include "platform/audio/AudioUtilities.h"
 
 namespace blink {
 
@@ -66,9 +67,13 @@ OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsi
         return 0;
     }
 
-    if (!isSampleRateRangeGood(sampleRate)) {
-        exceptionState.throwDOMException(IndexSizeError, ExceptionMessages::indexOutsideRange(
-            "sampleRate", sampleRate, 3000.f, ExceptionMessages::InclusiveBound, 192000.f, ExceptionMessages::InclusiveBound));
+    if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate)) {
+        exceptionState.throwDOMException(
+            IndexSizeError,
+            ExceptionMessages::indexOutsideRange(
+                "sampleRate", sampleRate,
+                AudioUtilities::minAudioBufferSampleRate(), ExceptionMessages::InclusiveBound,
+                AudioUtilities::maxAudioBufferSampleRate(), ExceptionMessages::InclusiveBound));
         return nullptr;
     }