Make Position::LastPositionInNode() to take const Node& instead of Node*

third_party/WebKit/Source/core/editing/SurroundingText.cpp

Index: third_party/WebKit/Source/core/editing/SurroundingText.cpp
diff --git a/third_party/WebKit/Source/core/editing/SurroundingText.cpp b/third_party/WebKit/Source/core/editing/SurroundingText.cpp
index 7e9926dd7e6693f3bf58d8d0f66d208bcc7ee036..a4db50ce882c9ef697ab2b754c5edf6f876b7f16 100644
--- a/third_party/WebKit/Source/core/editing/SurroundingText.cpp
+++ b/third_party/WebKit/Source/core/editing/SurroundingText.cpp
@@ -74,7 +74,7 @@ void SurroundingText::Initialize(const Position& start_position,
 
   CharacterIterator forward_iterator(
       end_position,
-      Position::LastPositionInNode(root_element).ParentAnchoredEquivalent(),
+      Position::LastPositionInNode(*root_element).ParentAnchoredEquivalent(),
       TextIteratorBehavior::Builder().SetStopsOnFormControls(true).Build());
   // FIXME: why do we stop going trough the text if we were not able to select
   // something on the right?