Rewrite YouTube Flash embeds

third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp b/third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp
index dfb698dacd38e11963dcac100fb43ce12cac9db6..b10434d1aa7a17569872bad6a5b4a4a088d73dd5 100644
--- a/third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLEmbedElement.cpp
@@ -33,6 +33,7 @@
 #include "core/html/PluginDocument.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/layout/LayoutPart.h"
+#include "core/loader/FrameLoaderClient.h"
 
 namespace blink {
 
@@ -146,6 +147,14 @@ void HTMLEmbedElement::updateWidgetInternal()
     if (!layoutObject())
         return;
 
+    // Overwrites the URL and MIME type of a Flash embed to use an
+    // HTML5 embed when possible.
+    KURL overridenUrl = document().frame()->loader().client()->overrideFlashEmbedWithHTML(document().completeURL(m_url));
+    if (!overridenUrl.isEmpty()) {
+        m_url = overridenUrl.getString();

[Mike West, 2016/08/04 12:41:39]

As an unrelated aside, it's super-weird that `m_url` is a string here and not a
KURL. :/

[kdsilva, 2016/08/05 11:06:02]

Haha, you're not wrong. 

+        m_serviceType = "text/html";
+    }
+
     requestObject(m_url, m_serviceType, paramNames, paramValues);
 }