PlzNavigate: preserve SourceLocation when navigating

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

Index: third_party/WebKit/Source/core/loader/DocumentLoader.h
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.h b/third_party/WebKit/Source/core/loader/DocumentLoader.h
index bc1e5d3ff5c8991b26873dad183d20a34f2c1f0b..337cd0729142aeab734668476fc8bb24d6ddd51f 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.h
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.h
@@ -30,6 +30,8 @@
 #ifndef DocumentLoader_h
 #define DocumentLoader_h
 
+#include <memory>
+#include "bindings/core/v8/SourceLocation.h"
 #include "core/CoreExport.h"
 #include "core/dom/ViewportDescription.h"
 #include "core/dom/WeakIdentifierMap.h"
@@ -183,6 +185,9 @@ class CORE_EXPORT DocumentLoader
 
   Resource* startPreload(Resource::Type, FetchRequest&);
 
+  std::unique_ptr<SourceLocation> copySourceLocation() const;
+  void setSourceLocation(std::unique_ptr<SourceLocation>);
+
   DECLARE_VIRTUAL_TRACE();
 
  protected:
@@ -283,6 +288,11 @@ class CORE_EXPORT DocumentLoader
 
   bool m_wasBlockedAfterCSP;
 
+  // PlzNavigate: set when committing a navigation. The data has originally been
+  // captured when the navigation was sent to the browser process, and it is
+  // sent back at commit time.
+  std::unique_ptr<SourceLocation> m_sourceLocation;
+
   enum State {
     NotStarted,
     Provisional,