SOCIAL-265 FIX Help floater in client should bypass the usual media MIME type detection

indra/newview/llfloaterhelpbrowser.cpp

@@ -132,9 +132,10 @@ void LLFloaterHelpBrowser::onClickOpenWebBrowser(void* user_data)
 
 void LLFloaterHelpBrowser::openMedia(const std::string& media_url)
 {
-	mBrowser->setHomePageUrl(media_url);
-	//mBrowser->navigateTo("data:text/html;charset=utf-8,I'd really love to be going to:<br><b>" + media_url + "</b>"); // tofu HACK for debugging =:)
-	mBrowser->navigateTo(media_url);
+	// explicitly make the media mime type for this floater since it will
+	// only ever display one type of content (Web).
+	mBrowser->setHomePageUrl(media_url, "text/html");
+	mBrowser->navigateTo(media_url, "text/html");
 	setCurrentURL(media_url);
 }
 

indra/newview/skins/default/xui/en/floater_help_browser.xml

@@ -36,7 +36,8 @@
          user_resize="false"
          width="620">
             <web_browser
-              trusted_content="true" 
+             trusted_content="true" 
+             initial_mime_type="text/html" 
              bottom="-25"
              follows="left|right|top|bottom"
              layout="topleft"