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 c2b118ac412d890aa7cae91a3567237a17774b19..98fce1e72479066076c330e0d363c5d2374b544d 100644
--- a/third_party/WebKit/public/web/WebDataSource.h
+++ b/third_party/WebKit/public/web/WebDataSource.h
@@ -33,6 +33,7 @@
 
 #include "../platform/WebCommon.h"
 #include "WebNavigationType.h"
+#include "WebSourceLocation.h"
 #include "WebTextDirection.h"
 
 namespace blink {
@@ -120,6 +121,11 @@ class WebDataSource {
   // datasource is destroyed or when a new filter is set.
   virtual void setSubresourceFilter(WebDocumentSubresourceFilter*) = 0;
 
+  // PlzNavigate
+  // Allows to specify the SourceLocation that triggered the navigation.
+  virtual void setSourceLocation(const WebSourceLocation&) = 0;
+  virtual void resetSourceLocation() = 0;
+
  protected:
   ~WebDataSource() {}
 };