Add --enable-true-color-rendering flag

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 3d2fa44a324be9f96c7910d2ce83025033380eab..94890bdfdf6b9751ba9c5af9ec7f3f7129fb219e 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -46,12 +46,17 @@ const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor";
 // Compress tile textures for GPUs supporting it.
 const char kEnableTileCompression[] = "enable-tile-compression";
 
-// Enable color space aware rasterization and compositing.
+// Convert rasterization and compositing inputs to the output color space
+// before operating on them.
 const char kEnableColorCorrectRendering[] = "enable-color-correct-rendering";
 
 // Enables the GPU benchmarking extension
 const char kEnableGpuBenchmarking[] = "enable-gpu-benchmarking";
 
+// 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";
+
 // Renders a border around compositor layers to help debug and study
 // layer compositing.
 const char kShowCompositedLayerBorders[] = "show-composited-layer-borders";