Support for AudioContextOptions latencyHint.

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index 747885a940b479fac6bcd5a2f069c40775d78f50..6335b3d8543870ae7acb7723c32ed8cf56946839 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -72,6 +72,7 @@ namespace blink {
 
 class InterfaceProvider;
 class WebAudioBus;
+class WebAudioLatencyHint;
 class WebBlobRegistry;
 class WebCanvasCaptureHandler;
 class WebClipboard;
@@ -175,13 +176,13 @@ class BLINK_PLATFORM_EXPORT Platform {
 
   // Creates a device for audio I/O.
   // Pass in (numberOfInputChannels > 0) if live/local audio input is desired.
-  virtual WebAudioDevice* createAudioDevice(size_t bufferSize,
-                                            unsigned numberOfInputChannels,
-                                            unsigned numberOfChannels,
-                                            double sampleRate,
-                                            WebAudioDevice::RenderCallback*,
-                                            const WebString& deviceId,
-                                            const WebSecurityOrigin&) {
+  virtual WebAudioDevice* createAudioDevice(
+      unsigned numberOfInputChannels,
+      unsigned numberOfChannels,
+      const WebAudioLatencyHint& latencyHint,
+      WebAudioDevice::RenderCallback*,
+      const WebString& deviceId,
+      const WebSecurityOrigin&) {
     return nullptr;
   }