Add a mimeHandler extension API.

extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc

Index: extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
diff --git a/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
index 26fb23a85ac0acb6c4b37d538ae7acc90f9c5911..d022ffdad6999d09964abb59a8de76a603806f56 100644
--- a/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
+++ b/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc
@@ -9,8 +9,10 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/stream_handle.h"
 #include "content/public/browser/stream_info.h"
+#include "content/public/common/service_registry.h"
 #include "content/public/common/url_constants.h"
 #include "extensions/browser/api/extensions_api_client.h"
+#include "extensions/browser/api/mime_handler/mime_handler.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_constants.h"
@@ -27,9 +29,15 @@ using content::WebContents;
 namespace extensions {
 
 StreamContainer::StreamContainer(scoped_ptr<content::StreamInfo> stream,
+                                 int tab_id,
+                                 int64_t expected_content_size,
+                                 bool embedded,
                                  const GURL& handler_url,
                                  const std::string& extension_id)
     : stream_(stream.Pass()),
+      embedded_(embedded),
+      expected_content_size_(expected_content_size),
+      tab_id_(tab_id),
       handler_url_(handler_url),
       extension_id_(extension_id),
       weak_factory_(this) {
@@ -132,6 +140,8 @@ void MimeHandlerViewGuest::DidAttachToEmbedder() {
   web_contents()->GetController().LoadURL(
       stream_->handler_url(), content::Referrer(),
       ui::PAGE_TRANSITION_AUTO_TOPLEVEL, std::string());
+  web_contents()->GetMainFrame()->GetServiceRegistry()->AddService(
+      base::Bind(&MimeHandlerServiceImpl::Create, stream_->GetWeakPtr()));
 }
 
 void MimeHandlerViewGuest::DidInitialize() {