Add initial_mime_type param to LLFloaterWebContent, defaulted to "text/html"

indra/newview/llfloaterwebcontent.cpp

@@ -43,6 +43,7 @@
 LLFloaterWebContent::_Params::_Params()
 :	url("url"),
 	target("target"),
+	initial_mime_type("initial_mime_type", "text/html"),
 	id("id"),
 	window_class("window_class", "web_content"),
 	show_chrome("show_chrome", true),
@@ -283,9 +284,9 @@ void LLFloaterWebContent::open_media(const Params& p)
 {
 	// Specifying a mime type of text/html here causes the plugin system to skip the MIME type probe and just open a browser plugin.
 	LLViewerMedia::proxyWindowOpened(p.target(), p.id());
-	mWebBrowser->setHomePageUrl(p.url, "text/html");
+	mWebBrowser->setHomePageUrl(p.url, p.initial_mime_type);
 	mWebBrowser->setTarget(p.target);
-	mWebBrowser->navigateTo(p.url, "text/html");
+	mWebBrowser->navigateTo(p.url, p.initial_mime_type);
 	
 	set_current_url(p.url);
 

indra/newview/llfloaterwebcontent.h

@@ -50,6 +50,7 @@ public:
 	{
 		Optional<std::string>	url,
 								target,
+								initial_mime_type,
 								window_class,
 								id;
 		Optional<bool>			show_chrome,