Add support for reading blobs when using the network service.

content/browser/loader/navigation_url_loader_network_service.cc

Index: content/browser/loader/navigation_url_loader_network_service.cc
diff --git a/content/browser/loader/navigation_url_loader_network_service.cc b/content/browser/loader/navigation_url_loader_network_service.cc
index f484182c77a6da1dc5bcdbfd8f230265fb458370..b6c4a157b44fb8d60276117fec4e97535dc6537a 100644
--- a/content/browser/loader/navigation_url_loader_network_service.cc
+++ b/content/browser/loader/navigation_url_loader_network_service.cc
@@ -66,11 +66,13 @@ WebContents* GetWebContentsFromFrameTreeNodeID(int frame_tree_node_id) {
 // redirects happen.
 class NavigationURLLoaderNetworkService::URLLoaderRequestController {
  public:
-  URLLoaderRequestController(std::unique_ptr<ResourceRequest> resource_request,
-                             ResourceContext* resource_context)
+  URLLoaderRequestController(
+      std::unique_ptr<ResourceRequest> resource_request,
+      ResourceContext* resource_context,
+      scoped_refptr<URLLoaderFactoryGetter> url_loader_factory_getter)
       : resource_request_(std::move(resource_request)),
         resource_context_(resource_context),
-        network_factory_(nullptr) {}
+        url_loader_factory_getter_(url_loader_factory_getter) {}
 
   virtual ~URLLoaderRequestController() {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ -81,7 +83,6 @@ class NavigationURLLoaderNetworkService::URLLoaderRequestController {
       AppCacheNavigationHandleCore* appcache_handle_core,
       std::unique_ptr<NavigationRequestInfo> request_info,
       mojom::URLLoaderFactoryPtrInfo factory_for_webui,
-      scoped_refptr<URLLoaderFactoryGetter> url_loader_factory_getter,
       const base::Callback<WebContents*(void)>& web_contents_getter,
       mojom::URLLoaderRequest url_loader_request,
       mojom::URLLoaderClientPtr url_loader_client_ptr,
@@ -132,9 +133,6 @@ class NavigationURLLoaderNetworkService::URLLoaderRequestController {
       // TODO: add appcache code here.
     }
 
-    DCHECK(!network_factory_);
-    network_factory_ = url_loader_factory_getter->GetNetworkFactory()->get();
-
     Restart(std::move(url_loader_request), std::move(url_loader_client_ptr));
   }
 
@@ -167,8 +165,12 @@ class NavigationURLLoaderNetworkService::URLLoaderRequestController {
     }
 
     DCHECK_EQ(handlers_.size(), handler_index_);
-    DCHECK(network_factory_ != nullptr);
-    MaybeStartLoader(network_factory_);
+    if (resource_request_->url.SchemeIs(url::kBlobScheme)) {
+      factory = url_loader_factory_getter_->GetBlobFactory()->get();
+    } else {
+      factory = url_loader_factory_getter_->GetNetworkFactory()->get();
+    }
+    MaybeStartLoader(factory);
   }
 
  private:
@@ -178,9 +180,7 @@ class NavigationURLLoaderNetworkService::URLLoaderRequestController {
   std::unique_ptr<ResourceRequest> resource_request_;
   ResourceContext* resource_context_;
 
-  // The factory for doing a vanilla network request, called when
-  // any of other request handlers handle the given request.
-  mojom::URLLoaderFactory* network_factory_;
+  scoped_refptr<URLLoaderFactoryGetter> url_loader_factory_getter_;
 
   // Kept around until we create a loader.
   mojom::URLLoaderRequest url_loader_request_;
@@ -248,14 +248,16 @@ NavigationURLLoaderNetworkService::NavigationURLLoaderNetworkService(
       schemes.end()) {
     FrameTreeNode* frame_tree_node =
         FrameTreeNode::GloballyFindByID(frame_tree_node_id);
-    factory_for_webui = GetWebUIURLLoader(frame_tree_node).PassInterface();
+    factory_for_webui = CreateWebUIURLLoader(frame_tree_node).PassInterface();
   }
 
   g_next_request_id--;
 
   DCHECK(!request_controller_);
   request_controller_ = base::MakeUnique<URLLoaderRequestController>(
-      std::move(new_request), resource_context);
+      std::move(new_request), resource_context,
+      static_cast<StoragePartitionImpl*>(storage_partition)
+          ->url_loader_factory_getter());
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(
@@ -267,8 +269,6 @@ NavigationURLLoaderNetworkService::NavigationURLLoaderNetworkService(
           appcache_handle ? appcache_handle->core() : nullptr,
           base::Passed(std::move(request_info)),
           base::Passed(std::move(factory_for_webui)),
-          static_cast<StoragePartitionImpl*>(storage_partition)
-              ->url_loader_factory_getter(),
           base::Bind(&GetWebContentsFromFrameTreeNodeID, frame_tree_node_id),
           base::Passed(std::move(loader_request)),
           base::Passed(std::move(url_loader_client_ptr_to_pass)),