[cc] Color evicted vs. invalidated checkerboard tiles differently

cc/ShaderChromium.h

Index: cc/ShaderChromium.h
diff --git a/cc/ShaderChromium.h b/cc/ShaderChromium.h
index 753d92af999670bb14c1693c1d30f701785501f4..2518382e318f06b51a602ed3fa5dd9cefa56855c 100644
--- a/cc/ShaderChromium.h
+++ b/cc/ShaderChromium.h
@@ -338,10 +338,12 @@ public:
     int alphaLocation() const { return m_alphaLocation; }
     int texTransformLocation() const { return m_texTransformLocation; }
     int frequencyLocation() const { return m_frequencyLocation; }
+    int colorLocation() const { return m_colorLocation; }
 private:
     int m_alphaLocation;
     int m_texTransformLocation;
     int m_frequencyLocation;
+    int m_colorLocation;
 };
 
 } // namespace cc