Optimize GLSL shaders.

Change-Id: I9a5e01bced63d8da0c61330a543a2b805388a59d
diff --git a/libs/hwui/Program.h b/libs/hwui/Program.h
index 6531c74..026097c 100644
--- a/libs/hwui/Program.h
+++ b/libs/hwui/Program.h
@@ -77,16 +77,16 @@
              const mat4& transformMatrix);
 
     /**
+     * Sets the color associated with this shader.
+     */
+    void setColor(const float r, const float g, const float b, const float a);
+
+    /**
      * Name of the position attribute.
      */
     int position;
 
     /**
-     * Name of the color uniform.
-     */
-    int color;
-
-    /**
      * Name of the transform uniform.
      */
     int transform;