Forward MIME types to BrowserPlugin when a viewer is specified.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index c5e067d8cd77d2a30bf0a0d702cef1bd32cb1514..83a301e7f30ecaf49b1e8d030a9f7997a807dd46 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -605,7 +605,7 @@ ResourceDispatcherHostImpl::CreateResourceHandlerForDownload(
   return handler.Pass();
 }
 
-scoped_ptr<ResourceHandler>
+scoped_ptr<StreamResourceHandler>
 ResourceDispatcherHostImpl::MaybeInterceptAsStream(net::URLRequest* request,
                                                    ResourceResponse* response) {
   ResourceRequestInfoImpl* info = ResourceRequestInfoImpl::ForRequest(request);
@@ -613,13 +613,17 @@ ResourceDispatcherHostImpl::MaybeInterceptAsStream(net::URLRequest* request,
 
   GURL origin;
   std::string target_id;
+  std::string payload;
+  std::string view_id;
   if (!delegate_ ||
       !delegate_->ShouldInterceptResourceAsStream(info->GetContext(),
                                                   request->url(),
                                                   mime_type,
                                                   &origin,
-                                                  &target_id)) {
-    return scoped_ptr<ResourceHandler>();
+                                                  &target_id,
+                                                  &payload,
+                                                  &view_id)) {
+    return scoped_ptr<StreamResourceHandler>();
   }
 
   StreamContext* stream_context =
@@ -628,7 +632,8 @@ ResourceDispatcherHostImpl::MaybeInterceptAsStream(net::URLRequest* request,
   scoped_ptr<StreamResourceHandler> handler(
       new StreamResourceHandler(request,
                                 stream_context->registry(),
-                                origin));
+                                origin,
+                                payload));
 
   info->set_is_stream(true);
   delegate_->OnStreamCreated(
@@ -636,12 +641,13 @@ ResourceDispatcherHostImpl::MaybeInterceptAsStream(net::URLRequest* request,
       info->GetChildID(),
       info->GetRouteID(),
       target_id,
+      view_id,
       handler->stream()->CreateHandle(
           request->url(),
           mime_type,
           response->head.headers),
       request->GetExpectedContentSize());
-  return handler.PassAs<ResourceHandler>();
+  return handler.Pass();
 }
 
 void ResourceDispatcherHostImpl::ClearSSLClientAuthHandlerForRequest(