Fix textPath textLength position adjustment for the spacing case

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

Index: third_party/WebKit/Source/core/layout/svg/SVGTextLayoutEngine.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutEngine.cpp b/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutEngine.cpp
index e5822beb80aafc9f2bec25eebb167531f5fd4e7e..20182a0461aff791bbb35d077f49c5fcf88689af 100644
--- a/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutEngine.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/SVGTextLayoutEngine.cpp
@@ -206,11 +206,16 @@ void SVGTextLayoutEngine::BeginTextPathLayout(SVGInlineFlowBox* flow_box) {
     return;
 
   float total_length = text_path_chunk_layout_builder.TotalLength();
-  if (length_adjust == kSVGLengthAdjustSpacing)
-    text_path_spacing_ = (desired_text_length - total_length) /
-                         text_path_chunk_layout_builder.TotalCharacters();
-  else
+  if (length_adjust == kSVGLengthAdjustSpacing) {
+    text_path_spacing_ = 0;
+    if (text_path_chunk_layout_builder.TotalCharacters() > 1) {
+      text_path_spacing_ = desired_text_length - total_length;
+      text_path_spacing_ /=
+          text_path_chunk_layout_builder.TotalCharacters() - 1;
+    }
+  } else {
     text_path_scaling_ = desired_text_length / total_length;
+  }
 }
 
 void SVGTextLayoutEngine::EndTextPathLayout() {