Rename TouchEventAPI to TouchEventFeatureDetection

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 40766c3a99f44b89ca86f7ae3e17ce503d74397c..d8a7de7c162ac23d413f6fece685d80b2eebb94c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -67610,15 +67610,19 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <owner>pthammaiah@google.com</owner>
 </histogram>
 
-<histogram name="Touchscreen.TouchEventsEnabled" enum="TouchEventsState">
+<histogram name="Touchscreen.TouchEventsEnabled"
+    enum="TouchEventFeatureDetectionState">
   <owner>rbyers@chromium.org</owner>
   <summary>
-    Tracks whether Touch Events API is enabled. This is based on the touch
-    events enabled flag and the presence of a touchscreen.
+    Tracks whether Touch Event Feature Detection is enabled. This is based on
+    the touch events enabled flag and the presence of a touchscreen.
   </summary>
   <details>
     NOTE: This metric was incorrectly recorded on ChromeOS for versions 42
-    through 45, see http://crbug.com/499476 for more details.
+    through 45, see http://crbug.com/499476 for more details. As of
+    http://crbug.com/644318, we changed the internal name to
+    TouchEventFeatureDetection, but we still keep the old histogram name here to
+    keep consistensy.
   </details>
 </histogram>
 
@@ -104468,7 +104472,7 @@ value.
   <int value="1" label="Handled touch events"/>
 </enum>
 
-<enum name="TouchEventsState" type="int">
+<enum name="TouchEventFeatureDetectionState" type="int">
   <int value="0" label="Enabled"/>
   <int value="1" label="Automatic - enabled"/>
   <int value="2" label="Automatic - disabled"/>