Reland Allow one-copy and zero-copy task tile worker pools to use compressed textures.

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 4e02de13206a1539819ef4bc36abbe207b50fa92..25565b1f1163a39dcc3ad8fe53dcd3a9e07190a7 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -45,6 +45,9 @@ const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor";
 const char kStrictLayerPropertyChangeChecking[] =
     "strict-layer-property-change-checking";
 
+// Compress tile textures for GPUs supporting it.
+const char kEnableTileCompression[] = "enable-tile-compression";
+
 // Use a BeginFrame signal from browser to renderer to schedule rendering.
 const char kEnableBeginFrameScheduling[] = "enable-begin-frame-scheduling";