Always initialize |m_totalWidth| in HarfBuzzShaper::shape.

Source/platform/fonts/shaping/HarfBuzzShaper.cpp

Index: Source/platform/fonts/shaping/HarfBuzzShaper.cpp
diff --git a/Source/platform/fonts/shaping/HarfBuzzShaper.cpp b/Source/platform/fonts/shaping/HarfBuzzShaper.cpp
index 5a8d259d135af7f7dc8974cb8232cf9c2d9bbded..8ae844589e735d506a73b10eb121e2cf62d89b59 100644
--- a/Source/platform/fonts/shaping/HarfBuzzShaper.cpp
+++ b/Source/platform/fonts/shaping/HarfBuzzShaper.cpp
@@ -538,10 +538,10 @@ void HarfBuzzShaper::setFontFeatures()
 
 bool HarfBuzzShaper::shape(GlyphBuffer* glyphBuffer)
 {
+    m_totalWidth = 0;

[Daniel Erat, 2015/04/27 15:42:21]

mind initializing it in the c'tor as well? having uninitialized members hanging
around makes me nervous.

     if (!createHarfBuzzRuns())
         return false;
 
-    m_totalWidth = 0;
     if (!shapeHarfBuzzRuns())
         return false;