Avoid (theorethical) NPE.

All forwarded methods, expect didReceiveResponse, contains m_client check.

Added check to didReceiveResponse for consistency.

BUG=356654

Review URL: https://codereview.chromium.org/213383008

git-svn-id: svn://svn.chromium.org/blink/trunk@170279 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/AssociatedURLLoader.cpp

@@ -201,6 +201,9 @@ void AssociatedURLLoader::ClientAdapter::didSendData(unsigned long long bytesSen
 
 void AssociatedURLLoader::ClientAdapter::didReceiveResponse(unsigned long, const ResourceResponse& response)
 {
+    if (!m_client)
+        return;
+
     // Try to use the original ResourceResponse if possible.
     WebURLResponse validatedResponse = WrappedResourceResponse(response);
     HTTPResponseHeaderValidator validator(m_options.crossOriginRequestPolicy == WebURLLoaderOptions::CrossOriginRequestPolicyUseAccessControl);