OOPIF: Handle cross-site frames being blocked by X-Frame-Options or CSP.

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index 8868bda7f8631457ea7dd08ca2a25a180ed7d1a6..df071be6670c36d246ad52be7dd0b29d3ebba3b0 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -377,11 +377,18 @@ bool DocumentLoader::shouldContinueForResponse() const
 
 void DocumentLoader::cancelLoadAfterXFrameOptionsOrCSPDenied(const ResourceResponse& response)
 {
+    // TODO(alexmos): Figure out how this needs to be called in OOPIF scenarios.
     InspectorInstrumentation::continueAfterXFrameOptionsDenied(m_frame, this, mainResourceIdentifier(), response);
 
-    frame()->document()->enforceSandboxFlags(SandboxOrigin);
-    if (FrameOwner* owner = frame()->owner())
-        owner->dispatchLoad();
+    // If this load was started in a different process, that process needs to
+    // be notified about the block, so that it can fire the FrameOwner load
+    // event and set a unique origin for the frame that was blocked.
+    //
+    // TODO(mkwst,alexmos): This will become unnecessary after XFO and CSP
+    // enforcement is moved to the browser process (https://crbug.com/555418).
+    frameLoader()->client()->didBlockLoad();
+
+    frame()->updateForBlockedLoad();
 
     // The load event might have detached this frame. In that case, the load will already have been cancelled during detach.
     if (frameLoader())