PlzNavigate: preserve SourceLocation when navigating

third_party/WebKit/public/web/WebDataSource.h

Index: third_party/WebKit/public/web/WebDataSource.h
diff --git a/third_party/WebKit/public/web/WebDataSource.h b/third_party/WebKit/public/web/WebDataSource.h
index a084487335ca8ac0d6d4cbb665b4799caf892db2..7ba1d27e40d62dfa4567961b2efbf32ae72c40e1 100644
--- a/third_party/WebKit/public/web/WebDataSource.h
+++ b/third_party/WebKit/public/web/WebDataSource.h
@@ -35,6 +35,7 @@
 
 #include "../platform/WebCommon.h"
 #include "WebNavigationType.h"
+#include "WebSourceLocation.h"
 #include "WebTextDirection.h"
 
 namespace blink {
@@ -131,6 +132,11 @@ class WebDataSource {
   virtual WebServiceWorkerNetworkProvider*
   getServiceWorkerNetworkProvider() = 0;
 
+  // PlzNavigate
+  // Allows to specify the SourceLocation that triggered the navigation.
+  virtual void setSourceLocation(const WebSourceLocation&) = 0;
+  virtual void resetSourceLocation() = 0;
+
  protected:
   ~WebDataSource() {}
 };