PlzNavigate: preserve SourceLocation when navigating

third_party/WebKit/Source/web/LocalFrameClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 553 matching lines @@
   navigationInfo.isClientRedirect = isClientRedirect;
   // Caching could be disabled for requests initiated by DevTools.
   // TODO(ananta)
   // We should extract the network cache state into a global component which
   // can be queried here and wherever necessary.
   navigationInfo.isCacheDisabled =
       devToolsAgent() ? devToolsAgent()->cacheDisabled() : false;
   if (form)
     navigationInfo.form = WebFormElement(form);
 
+  std::unique_ptr<SourceLocation> sourceLocation =
+      SourceLocation::capture(m_webFrame->frame()->document());
+  if (sourceLocation && !sourceLocation->isUnknown()) {
+    navigationInfo.hasSourceLocation = true;

[Nate Chapin, 2017/03/01 23:22:19]

Rather than have hasSourceLocation, could we either have
WebSourceLocation::isUnknown(), or just check WebSourceLocation.url.isNull()?

[clamy, 2017/03/02 13:34:32]

Done.

+    navigationInfo.sourceLocation.url = sourceLocation->url();
+    navigationInfo.sourceLocation.lineNumber = sourceLocation->lineNumber();
+    navigationInfo.sourceLocation.columnNumber = sourceLocation->columnNumber();
+  } else {
+    navigationInfo.hasSourceLocation = false;
+  }
+
   WebNavigationPolicy webPolicy =
       m_webFrame->client()->decidePolicyForNavigation(navigationInfo);
   return static_cast<NavigationPolicy>(webPolicy);
 }
 
 void LocalFrameClientImpl::dispatchWillSendSubmitEvent(HTMLFormElement* form) {
   if (m_webFrame->client())
     m_webFrame->client()->willSendSubmitEvent(WebFormElement(form));
 }
 
@@ skipping 437 matching lines @@
 KURL LocalFrameClientImpl::overrideFlashEmbedWithHTML(const KURL& url) {
   return m_webFrame->client()->overrideFlashEmbedWithHTML(WebURL(url));
 }
 
 void LocalFrameClientImpl::setHasReceivedUserGesture() {
   if (m_webFrame->client())
     m_webFrame->client()->setHasReceivedUserGesture();
 }
 
 }  // namespace blink