Mark layers that can use LCD text based on layer transform and opacity.

cc/tiled_layer.cc

Index: cc/tiled_layer.cc
diff --git a/cc/tiled_layer.cc b/cc/tiled_layer.cc
index 4d4a355a62ab310aba79d3589ce82684736f49fb..323dd9276550201ef159ee5893c32c5b351ff805 100644
--- a/cc/tiled_layer.cc
+++ b/cc/tiled_layer.cc
@@ -276,12 +276,13 @@ void TiledLayer::setNeedsDisplayRect(const gfx::RectF& dirtyRect)
     ContentsScalingLayer::setNeedsDisplayRect(dirtyRect);
 }
 
-void TiledLayer::setUseLCDText(bool useLCDText)
+void TiledLayer::setCanUseLCDText(bool useLCDText)
 {
-    ContentsScalingLayer::setUseLCDText(useLCDText);
+    ContentsScalingLayer::setCanUseLCDText(useLCDText);
 
     LayerTilingData::BorderTexelOption borderTexelOption;
 #if OS(ANDROID)
+    DCHECK(!useLCDText);

[danakj, 2012/11/07 18:15:00]

This won't work well with making it a LayerTreeSetting.

Maybe DCHECK(layerTreeHost()->settings().canUseLCDText || !useLCDText) ?

[alokp, 2012/11/08 22:34:07]

I realized that if-else block is not needed anymore. For Android useLCDText is
always false, so it will always get border texels.

     // Always want border texels and GL_LINEAR due to pinch zoom.
     borderTexelOption = LayerTilingData::HasBorderTexels;
 #else