Introduce "navigate" mode in Requests

third_party/WebKit/Source/modules/fetch/FetchManager.cpp

Index: third_party/WebKit/Source/modules/fetch/FetchManager.cpp
diff --git a/third_party/WebKit/Source/modules/fetch/FetchManager.cpp b/third_party/WebKit/Source/modules/fetch/FetchManager.cpp
index 9f61e5eca5799afac76dbdea89ae6320f6355cbc..a8cb2e3696c559f8e60cc9c7cb8a0f67a4307e94 100644
--- a/third_party/WebKit/Source/modules/fetch/FetchManager.cpp
+++ b/third_party/WebKit/Source/modules/fetch/FetchManager.cpp
@@ -219,6 +219,9 @@ void FetchManager::Loader::didReceiveResponse(unsigned long, const ResourceRespo
         case WebURLRequest::FetchRequestModeCORSWithForcedPreflight:
             m_request->setResponseTainting(FetchRequestData::CORSTainting);
             break;
+        case WebURLRequest::FetchRequestModeNavigate:
+            ASSERT_NOT_REACHED();
+            break;
         }
     }
 
@@ -381,6 +384,13 @@ void FetchManager::Loader::start()
         return;
     }
 
+    // "- |request|'s mode is |navigate|"
+    if (m_request->mode() == WebURLRequest::FetchRequestModeNavigate) {
+        // "The result of performing a basic fetch using |request|."
+        performBasicFetch();
+        return;
+    }
+
     // "- |request|'s mode is |same-origin|"
     if (m_request->mode() == WebURLRequest::FetchRequestModeSameOrigin) {
         // "A network error."
@@ -545,6 +555,9 @@ void FetchManager::Loader::performHTTPFetch(bool corsFlag, bool corsPreflightFla
     case WebURLRequest::FetchRequestModeCORSWithForcedPreflight:
         threadableLoaderOptions.crossOriginRequestPolicy = UseAccessControl;
         break;
+    case WebURLRequest::FetchRequestModeNavigate:
+        threadableLoaderOptions.crossOriginRequestPolicy = DenyCrossOriginRequests;
+        break;
     }
     InspectorInstrumentation::willStartFetch(executionContext(), this);
     m_loader = ThreadableLoader::create(*executionContext(), this, request, threadableLoaderOptions, resourceLoaderOptions);