Merge "Fix renderOverdraw() test"

    ASSERT_EQ(TestUtils::getColor(surface, 0, 0), SK_ColorWHITE);

    // 1 Overdraw, should be blue blended onto white.

    renderNodes.push_back(whiteNode); //this is the "content" node

    renderNodes.push_back(whiteNode); //the "content" node above does not cause an overdraw, because

    //it clips the first "background" node

    renderNodes.push_back(whiteNode);

    pipeline->renderFrame(layerUpdateQueue, dirty, renderNodes, opaque, contentDrawBounds, surface);

    ASSERT_EQ(TestUtils::getColor(surface, 0, 0), (unsigned) 0xffd0d0ff);