WebURLRequest: Track the requesting document's URL through navigations.

Source/core/loader/FrameLoadRequest.h

Index: Source/core/loader/FrameLoadRequest.h
diff --git a/Source/core/loader/FrameLoadRequest.h b/Source/core/loader/FrameLoadRequest.h
index 312b00253695d36e1e609734ef920f1cb76b5ee5..896b6e44d2e27ae1492e0b6d2ce4f9bc7340991f 100644
--- a/Source/core/loader/FrameLoadRequest.h
+++ b/Source/core/loader/FrameLoadRequest.h
@@ -46,6 +46,8 @@ public:
         , m_shouldSendReferrer(MaybeSendReferrer)
         , m_shouldCheckMainWorldContentSecurityPolicy(CheckContentSecurityPolicy)
     {
+        if (originDocument)
+            m_resourceRequest.setRequestorURL(originDocument->url());
     }
 
     FrameLoadRequest(Document* originDocument, const ResourceRequest& resourceRequest)
@@ -56,6 +58,8 @@ public:
         , m_shouldSendReferrer(MaybeSendReferrer)
         , m_shouldCheckMainWorldContentSecurityPolicy(CheckContentSecurityPolicy)
     {
+        if (originDocument)
+            m_resourceRequest.setRequestorURL(originDocument->url());
     }
 
     FrameLoadRequest(Document* originDocument, const ResourceRequest& resourceRequest, const AtomicString& frameName)
@@ -67,6 +71,8 @@ public:
         , m_shouldSendReferrer(MaybeSendReferrer)
         , m_shouldCheckMainWorldContentSecurityPolicy(CheckContentSecurityPolicy)
     {
+        if (originDocument)
+            m_resourceRequest.setRequestorURL(originDocument->url());
     }
 
     FrameLoadRequest(Document* originDocument, const ResourceRequest& resourceRequest, const AtomicString& frameName, ContentSecurityPolicyDisposition shouldCheckMainWorldContentSecurityPolicy)
@@ -78,6 +84,8 @@ public:
         , m_shouldSendReferrer(MaybeSendReferrer)
         , m_shouldCheckMainWorldContentSecurityPolicy(shouldCheckMainWorldContentSecurityPolicy)
     {
+        if (originDocument)
+            m_resourceRequest.setRequestorURL(originDocument->url());
     }
 
     FrameLoadRequest(Document* originDocument, const ResourceRequest& resourceRequest, const SubstituteData& substituteData)
@@ -89,6 +97,8 @@ public:
         , m_shouldSendReferrer(MaybeSendReferrer)
         , m_shouldCheckMainWorldContentSecurityPolicy(CheckContentSecurityPolicy)
     {
+        if (originDocument)
+            m_resourceRequest.setRequestorURL(originDocument->url());
     }
 
     Document* originDocument() const { return m_originDocument.get(); }