Introduce AsyncDocumentSubresourceFilter.

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

Index: third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp b/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
index fbe5a45c42781b934554259992f1660853f0d9aa..338486cd3cdf42c8c83d40d940c6218f181bb212 100644
--- a/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebDocumentSubresourceFilterTest.cpp
@@ -10,6 +10,7 @@
 #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"
@@ -27,14 +28,16 @@ class TestDocumentSubresourceFilter : public WebDocumentSubresourceFilter {
   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 {}