Change WebURLLoaderClient::willFollowRedirect() API to return bool

third_party/WebKit/Source/platform/testing/weburl_loader_mock.cc

Index: third_party/WebKit/Source/platform/testing/weburl_loader_mock.cc
diff --git a/third_party/WebKit/Source/platform/testing/weburl_loader_mock.cc b/third_party/WebKit/Source/platform/testing/weburl_loader_mock.cc
index 588fd5d1b9ebc617f40c7c95d724698bc12fdc97..9696a59f1f4c70b0e0eba5beb7ab420ff30513e0 100644
--- a/third_party/WebKit/Source/platform/testing/weburl_loader_mock.cc
+++ b/third_party/WebKit/Source/platform/testing/weburl_loader_mock.cc
@@ -82,20 +82,17 @@ WebURLRequest WebURLLoaderMock::ServeRedirect(
 
   WeakPtr<WebURLLoaderMock> self = weak_factory_.createWeakPtr();
 
-  client_->willFollowRedirect(this, newRequest, redirectResponse,
-                              kRedirectResponseOverheadBytes);
+  bool follow = client_->willFollowRedirect(this, newRequest, redirectResponse,
+                                            kRedirectResponseOverheadBytes);
+  if (!follow)
+    newRequest = WebURLRequest();
 
   // |this| might be deleted in willFollowRedirect().
   if (!self)
     return newRequest;
 
-  if (redirectURL != KURL(newRequest.url())) {
-    // Only follow the redirect if WebKit left the URL unmodified.
-    // We assume that WebKit only changes the URL to suppress a redirect, and we
-    // assume that it does so by setting it to be invalid.
-    DCHECK(!newRequest.url().isValid());
+  if (!follow)
     cancel();
-  }
 
   return newRequest;
 }