Don't block blob URLs by webview URL filtering.

android_webview/browser/net/aw_network_delegate.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/browser/net/aw_network_delegate.h"
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_contents_client_bridge_base.h"
 #include "android_webview/browser/aw_contents_io_thread_client.h"
 #include "android_webview/browser/aw_cookie_access_policy.h"
@@ skipping 38 matching lines @@
 }
 
 int AwNetworkDelegate::OnBeforeURLRequest(
     net::URLRequest* request,
     const net::CompletionCallback& callback,
     GURL* new_url) {
   if (!url_blacklist_manager_) {
     url_blacklist_manager_ =
         AwBrowserContext::GetDefault()->GetURLBlacklistManager();
   }
-  if (url_blacklist_manager_->IsURLBlocked(request->url()))
+  // Ignore blob scheme for two reasons:
+  // 1) PlzNavigate uses it to deliver the response to the renderer.
+  // 2) A whitelisted page can use blob URLs internally.
+  if (!request->url().SchemeIs(url::kBlobScheme) &&
+      url_blacklist_manager_->IsURLBlocked(request->url())) {
     return net::ERR_BLOCKED_BY_ADMINISTRATOR;
+  }
 
   return net::OK;
 }
 
 int AwNetworkDelegate::OnBeforeStartTransaction(
     net::URLRequest* request,
     const net::CompletionCallback& callback,
     net::HttpRequestHeaders* headers) {
   DCHECK(headers);
   headers->SetHeaderIfMissing(
@@ skipping 70 matching lines @@
                                                              cookie_line,
                                                              options);
 }
 
 bool AwNetworkDelegate::OnCanAccessFile(const net::URLRequest& request,
                                         const base::FilePath& path) const {
   return true;
 }
 
 }  // namespace android_webview