Auto merge of #6505 - ttaubert:issue/4666-crypto-getRandomValues, r=Ms2ger

Implement crypto.getRandomValues()

Didn't touch mozjs or rust-mozjs because implementing that in the code generator didn't seem too easy. I'm using the same workaround that the TextDecoder does.

Using the OsRng should be the right choice here? As the OS keeps state for us we wouldn't need to have a global rng instance to keep around.

Fixes #4666.

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components/script/dom/bindings/error.rs

@@ -62,6 +62,10 @@ pub enum Error {
     DataClone,
     /// NoModificationAllowedError DOMException
     NoModificationAllowed,
+    /// QuotaExceededError DOMException
+    QuotaExceeded,
+    /// TypeMismatchError DOMException
+    TypeMismatch,
 
     /// TypeError JavaScript Error
     Type(DOMString),
@@ -101,6 +105,8 @@ pub fn throw_dom_exception(cx: *mut JSContext, global: GlobalRef,
         Error::InvalidNodeType => DOMErrorName::InvalidNodeTypeError,
         Error::DataClone => DOMErrorName::DataCloneError,
         Error::NoModificationAllowed => DOMErrorName::NoModificationAllowedError,
+        Error::QuotaExceeded => DOMErrorName::QuotaExceededError,
+        Error::TypeMismatch => DOMErrorName::TypeMismatchError,
         Error::Type(message) => {
             assert!(unsafe { JS_IsExceptionPending(cx) } == 0);
             throw_type_error(cx, &message);