From 0e92efbb79cfeb92a9e64cea378457b489517cc6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fernando=20Jim=C3=A9nez=20Moreno?= <ferjmoreno@gmail.com>
Date: Fri, 29 Jun 2018 16:41:55 +0200
Subject: [PATCH] BaseAudioContext.CreateGain()

---
 components/script/dom/baseaudiocontext.rs             | 10 ++++++++++
 components/script/dom/webidls/BaseAudioContext.webidl |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/components/script/dom/baseaudiocontext.rs b/components/script/dom/baseaudiocontext.rs
index c6b43fcee8e..9152fad8b3e 100644
--- a/components/script/dom/baseaudiocontext.rs
+++ b/components/script/dom/baseaudiocontext.rs
@@ -8,6 +8,7 @@ use dom::bindings::codegen::Bindings::AudioNodeBinding::AudioNodeOptions;
 use dom::bindings::codegen::Bindings::AudioNodeBinding::{ChannelCountMode, ChannelInterpretation};
 use dom::bindings::codegen::Bindings::BaseAudioContextBinding::BaseAudioContextMethods;
 use dom::bindings::codegen::Bindings::BaseAudioContextBinding::AudioContextState;
+use dom::bindings::codegen::Bindings::GainNodeBinding::GainOptions;
 use dom::bindings::codegen::Bindings::OscillatorNodeBinding::OscillatorOptions;
 use dom::bindings::error::{Error, ErrorResult};
 use dom::bindings::inheritance::Castable;
@@ -16,6 +17,7 @@ use dom::bindings::refcounted::Trusted;
 use dom::bindings::reflector::DomObject;
 use dom::bindings::root::DomRoot;
 use dom::eventtarget::EventTarget;
+use dom::gainnode::GainNode;
 use dom::globalscope::GlobalScope;
 use dom::oscillatornode::OscillatorNode;
 use dom::promise::Promise;
@@ -267,6 +269,14 @@ impl BaseAudioContextMethods for BaseAudioContext {
         let options = unsafe { OscillatorOptions::empty(window.get_cx()) };
         OscillatorNode::new(&window, &self, &options)
     }
+
+    #[allow(unsafe_code)]
+    fn CreateGain(&self) -> DomRoot<GainNode> {
+        let global = self.global();
+        let window = global.as_window();
+        let options = unsafe { GainOptions::empty(window.get_cx()) };
+        GainNode::new(&window, &self, &options)
+    }
 }
 
 impl From<ProcessingState> for AudioContextState {
diff --git a/components/script/dom/webidls/BaseAudioContext.webidl b/components/script/dom/webidls/BaseAudioContext.webidl
index 81e0817c8cd..9adb5600fbb 100644
--- a/components/script/dom/webidls/BaseAudioContext.webidl
+++ b/components/script/dom/webidls/BaseAudioContext.webidl
@@ -36,7 +36,7 @@ interface BaseAudioContext : EventTarget {
   //                                              optional unsigned long numberOfInputChannels = 2,
   //                                             optional unsigned long numberOfOutputChannels = 2);
   // AnalyserNode           createAnalyser();
-  // GainNode               createGain();
+  GainNode               createGain();
   // DelayNode              createDelay(optional double maxDelayTime = 1);
   // BiquadFilterNode       createBiquadFilter();
   // IIRFilterNode          createIIRFilter(sequence<double> feedforward,