Use the right TextRun length when checking for surrogate pairs

third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.cpp

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.cpp b/third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.cpp
index fb03e762444b41671909d75ed18e42cd4c22826d..5c05772642645297c144ac83287cb1dfe9f4a22b 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.cpp
@@ -197,7 +197,7 @@ inline bool isValidSurrogatePair(const TextRun& run, unsigned index)
 {
     if (!U16_IS_LEAD(run[index]))
         return false;
-    if (index + 1 >= static_cast<unsigned>(run.charactersLength()))
+    if (index + 1 >= static_cast<unsigned>(run.length()))
         return false;
     return U16_IS_TRAIL(run[index + 1]);
 }