[KeyboardEvent] Add embedder APIs to translate between Dom |key| enum and strings

content/child/blink_platform_impl.cc

Index: content/child/blink_platform_impl.cc
diff --git a/content/child/blink_platform_impl.cc b/content/child/blink_platform_impl.cc
index 7b2d143416d540d9fa5e95a4db8499b91cbdaefa..d689c9ae4add1bbf3a22f62aa5948b7404e55b31 100644
--- a/content/child/blink_platform_impl.cc
+++ b/content/child/blink_platform_impl.cc
@@ -1395,4 +1395,14 @@ int BlinkPlatformImpl::domEnumFromCodeString(const WebString& code) {
       code.utf8().data()));
 }
 
+WebString BlinkPlatformImpl::domKeyStringFromEnum(int dom_key) {
+  return WebString::fromUTF8(ui::KeycodeConverter::DomKeyToKeyString(
+      static_cast<ui::DomKey>(dom_key)));
+}
+
+int BlinkPlatformImpl::domKeyEnumFromString(const WebString& key) {
+  return static_cast<int>(ui::KeycodeConverter::KeyStringToDomKey(
+      key.utf8().data()));
+}
+
 }  // namespace content