cc: The recent texture manager bug uncovered some unnecessary code

cc/overdraw_metrics.cc

Index: cc/overdraw_metrics.cc
diff --git a/cc/overdraw_metrics.cc b/cc/overdraw_metrics.cc
index 8c43dece0fbfac26d3ae2777384d2cf5530d2e5f..692de56e275036583d1e8f454097e25e800578f0 100644
--- a/cc/overdraw_metrics.cc
+++ b/cc/overdraw_metrics.cc
@@ -67,10 +67,10 @@ void CCOverdrawMetrics::didPaint(const IntRect& paintedRect)
     m_pixelsPainted += static_cast<float>(paintedRect.width()) * paintedRect.height();
 }
 
-void CCOverdrawMetrics::didCullTileForUpload()
+void CCOverdrawMetrics::didCullTilesForUpload(int count)
 {
     if (m_recordMetricsForFrame)
-        ++m_tilesCulledForUpload;
+        m_tilesCulledForUpload += count;
 }
 
 void CCOverdrawMetrics::didUpload(const WebTransformationMatrix& transformToTarget, const IntRect& uploadRect, const IntRect& opaqueRect)