[NotLanded] Implement the fetching algorithm of the Web Manifest.

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index aa63454adff9dfdd077e3273964c4e01b3d2e397..efab7ee5fc1f898ca0fb60ad54d0b21da7a4b8fb 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -833,4 +833,16 @@ void FrameLoaderClientImpl::dispatchDidChangeManifest()
         m_webFrame->client()->didChangeManifest(m_webFrame);
 }
 
+void FrameLoaderClientImpl::dispatchDidLoadManifest(const WebManifest& manifest)
+{
+    if (m_webFrame->client())
+        m_webFrame->client()->didLoadManifest(m_webFrame, manifest);
+}
+
+void FrameLoaderClientImpl::dispatchDidFailLoadManifest(WebManifestError error)
+{
+    if (m_webFrame->client())
+        m_webFrame->client()->didFailLoadManifest(m_webFrame, error);
+}
+
 } // namespace blink