PlzNavigate: preserve SourceLocation when navigating

third_party/WebKit/Source/web/WebDataSourceImpl.cpp

Index: third_party/WebKit/Source/web/WebDataSourceImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebDataSourceImpl.cpp b/third_party/WebKit/Source/web/WebDataSourceImpl.cpp
index c89c9bf12a1d58ade0791869e34ed9a1434eb641..6298cccc20af12de26e67e48019988f804d1746a 100644
--- a/third_party/WebKit/Source/web/WebDataSourceImpl.cpp
+++ b/third_party/WebKit/Source/web/WebDataSourceImpl.cpp
@@ -161,6 +161,18 @@ void WebDataSourceImpl::setSubresourceFilter(
       SubresourceFilter::create(this, WTF::wrapUnique(subresourceFilter)));
 }
 
+void WebDataSourceImpl::setSourceLocation(
+    const WebSourceLocation& sourceLocation) {
+  std::unique_ptr<SourceLocation> location =
+      SourceLocation::create(sourceLocation.url, sourceLocation.lineNumber,
+                             sourceLocation.columnNumber, nullptr);
+  DocumentLoader::setSourceLocation(std::move(location));
+}
+
+void WebDataSourceImpl::resetSourceLocation() {
+  DocumentLoader::setSourceLocation(nullptr);
+}
+
 DEFINE_TRACE(WebDataSourceImpl) {
   DocumentLoader::trace(visitor);
 }