Set "Running" state only when actually running

third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp

Index: third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
index d34708fca6f560a67e6822d45ff8eecc16cf8a20..d0acd8dbd40e27c20f1486655552d659e763b0ab 100644
--- a/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
@@ -770,6 +770,7 @@ void BaseAudioContext::resolvePromisesForResumeOnMainThread() {
       resolver->reject(DOMException::create(
           InvalidStateError, "Cannot resume a context that has been closed"));
     } else {
+      setContextState(Running);
       resolver->resolve();
     }
   }
@@ -871,14 +872,16 @@ ExecutionContext* BaseAudioContext::getExecutionContext() const {
 }
 
 void BaseAudioContext::startRendering() {
-  // This is called for both online and offline contexts.
+  // This is called for both online and offline contexts.  The caller
+  // must set the context state appropriately. In particular, resuming
+  // a context should wait until the context has actually resumed to
+  // set the state.
   DCHECK(isMainThread());
   DCHECK(m_destinationNode);
   DCHECK(isAllowedToStart());
 
   if (m_contextState == Suspended) {
     destination()->audioDestinationHandler().startRendering();
-    setContextState(Running);
   }
 }