Pyramid sequence for testing

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 55fdf77298689d3fd3328ddf72b27e76533de87e..f9b362731436cdf0138876c61ff45786c28c0d45 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -47,6 +47,11 @@ const char kEnableColorCorrectRendering[] = "enable-color-correct-rendering";
 // Enables the GPU benchmarking extension
 const char kEnableGpuBenchmarking[] = "enable-gpu-benchmarking";
 
+// Enables the different tiling iterator. For better iteration order of odd
+// sized tiles, i.e. tiles not having aspect ratio 1, specify
+// "--tiling-iterator=pyramid-sequence".
+const char kTilingIterator[] = "tiling-iterator";
+
 // Force all rasterization and compositing to be done in linear color space,
 // with physically correct blending and interpolation.
 const char kEnableTrueColorRendering[] = "enable-true-color-rendering";