Introduce AsyncDocumentSubresourceFilter.

third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp

 // Copyright 2016 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 "public/platform/WebDocumentSubresourceFilter.h"
 
 #include "core/dom/Element.h"
 #include "core/html/HTMLImageElement.h"
 #include "platform/testing/URLTestHelpers.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCache.h"
+#include "public/platform/WebDocumentSubresourceFilterLoadPolicy.h"
 #include "public/platform/WebURLLoaderMockFactory.h"
 #include "public/web/WebDocument.h"
 #include "public/web/WebElement.h"
 #include "public/web/WebLocalFrame.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "web/tests/FrameTestHelpers.h"
 
 namespace blink {
 
 namespace {
 
 class TestDocumentSubresourceFilter : public WebDocumentSubresourceFilter {
  public:
   explicit TestDocumentSubresourceFilter(bool allowLoads)
       : m_allowLoads(allowLoads) {}
 
-  LoadPolicy getLoadPolicy(const WebURL& resourceUrl,
-                           WebURLRequest::RequestContext) override {
+  WebDocumentSubresourceFilterLoadPolicy getLoadPolicy(
+      const WebURL& resourceUrl,
+      WebURLRequest::RequestContext) override {
     std::string resourcePath = WebString(KURL(resourceUrl).path()).utf8();
     if (std::find(m_queriedSubresourcePaths.begin(),
                   m_queriedSubresourcePaths.end(),
                   resourcePath) == m_queriedSubresourcePaths.end())
       m_queriedSubresourcePaths.push_back(resourcePath);
-    return m_allowLoads ? Allow : Disallow;
+    return m_allowLoads ? WebDocumentSubresourceFilterLoadPolicy::Allow
+                        : WebDocumentSubresourceFilterLoadPolicy::Disallow;
   }
 
   void reportDisallowedLoad() override {}
 
   const std::vector<std::string>& queriedSubresourcePaths() const {
     return m_queriedSubresourcePaths;
   }
 
  private:
   std::vector<std::string> m_queriedSubresourcePaths;
@@ skipping 96 matching lines @@
     loadDocument(!allowSubresources);
     expectSubresourceWasLoaded(!allowSubresources);
     EXPECT_THAT(queriedSubresourcePaths(),
                 ::testing::ElementsAre("/white-1x1.png"));
 
     WebCache::clear();
   }
 }
 
 }  // namespace blink