cc: Calculate "can use lcd text" on the compositor thread

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index bc94c61a0695ada9ac474e49eb17826e54ce7075..ac97d4ef9629ee82fb6890146a6f4d44c0e12972 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -29695,26 +29695,6 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
-<histogram name="Renderer4.LCDText.PercentageOfAALayers" units="%">
-  <owner>wiltzius@chromium.org</owner>
-  <summary>
-    The ratio of LCDText CC Layers / candidate LCDText layers. Recorded in
-    LayerTreeHost, after LayerTreeHostCommon::CalculateDrawProperties() has
-    computed the properties we need. Only recorded for the first 50 frames of
-    every page.
-  </summary>
-</histogram>
-
-<histogram name="Renderer4.LCDText.PercentageOfCandidateLayers" units="%">
-  <owner>wiltzius@chromium.org</owner>
-  <summary>
-    The ratio of CC Layers which are candidates for LCDText AA / total picture
-    or content Layers.  Recorded in LayerTreeHost, after
-    LayerTreeHostCommon::CalculateDrawProperties() has computed the properties
-    we need. Only recorded for the first 50 frames of every page.
-  </summary>
-</histogram>
-
 <histogram name="Renderer4.LoadType" enum="LoadType">
   <owner>wiltzius@chromium.org</owner>
   <summary>