Fix typo in histogram name.

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 b9111bb3ddfc3f3016e3dcb3737f9482bcee38ae..37eaebe30f0e4a2ec3e2273511a0cff8ad8e3ff8 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -8147,19 +8147,19 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
-<histogram name="Compositing.SurfaceAggregator.SurfaceDrawQuad.NoActiveFrame">
+<histogram name="Compositing.SurfaceAggregator.SurfaceDrawQuad.MissingSurface">
   <owner>kylechar@chromium.org</owner>
   <summary>
-    The number of SurfaceDrawQuads where the surface exists but doesn't have an
-    active CompositorFrame. This is logged for each call to Aggregate().
+    The number of SurfaceDrawQuads where the surface doesn't exist. This is
+    logged for each call to Aggregate().
   </summary>
 </histogram>
 
-<histogram name="Compositing.SurfaceAggregator.SurfaceDrawQuad.SurfaceMissing">
+<histogram name="Compositing.SurfaceAggregator.SurfaceDrawQuad.NoActiveFrame">
   <owner>kylechar@chromium.org</owner>
   <summary>
-    The number of SurfaceDrawQuads where the surface doesn't exist. This is
-    logged for each call to Aggregate().
+    The number of SurfaceDrawQuads where the surface exists but doesn't have an
+    active CompositorFrame. This is logged for each call to Aggregate().
   </summary>
 </histogram>