Revert of "Speculatively launch Service Workers on mouse/touch events."

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 b9eedc514e2d39d3d16efd7cdded30566b06489c..72d58a4c0da5ee86f24467f740fa240fff893433 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -63480,6 +63480,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="ServiceWorker.NavigationHintPrecision" enum="BooleanEnabled">
+  <obsolete>
+    This experiment was turned down, see https://crbug.com/616502.
+  </obsolete>
   <owner>horo@chromium.org</owner>
   <summary>
     The precision of the speculative launch of Service Workers for navigation
@@ -122960,11 +122963,23 @@ from previous Chrome versions.
   <suffix name="UNKNOWN" label="UNKNOWN"/>
   <suffix name="FOREIGN_FETCH" label="FOREIGN_FETCH"/>
   <suffix name="NAVIGATION_HINT_LINK_MOUSE_DOWN"
-      label="NAVIGATION_HINT_LINK_MOUSE_DOWN"/>
+      label="NAVIGATION_HINT_LINK_MOUSE_DOWN">
+    <obsolete>
+      This experiment was turned down, see https://crbug.com/616502.
+    </obsolete>
+  </suffix>
   <suffix name="NAVIGATION_HINT_LINK_TAP_UNCONFIRMED"
-      label="NAVIGATION_HINT_LINK_TAP_UNCONFIRMED"/>
+      label="NAVIGATION_HINT_LINK_TAP_UNCONFIRMED">
+    <obsolete>
+      This experiment was turned down, see https://crbug.com/616502.
+    </obsolete>
+  </suffix>
   <suffix name="NAVIGATION_HINT_LINK_TAP_DOWN"
-      label="NAVIGATION_HINT_LINK_TAP_DOWN"/>
+      label="NAVIGATION_HINT_LINK_TAP_DOWN">
+    <obsolete>
+      This experiment was turned down, see https://crbug.com/616502.
+    </obsolete>
+  </suffix>
   <affected-histogram name="ServiceWorker.EventDispatchingDelay"/>
   <affected-histogram name="ServiceWorker.StartWorker.StatusByPurpose"/>
   <affected-histogram name="ServiceWorker.StartWorker.Time_DuringStartup"/>
@@ -122980,6 +122995,9 @@ from previous Chrome versions.
 </histogram_suffixes>
 
 <histogram_suffixes name="ServiceWorker.NavigationHint" separator=".">
+  <obsolete>
+    This experiment was turned down, see https://crbug.com/616502.
+  </obsolete>
   <suffix name="LINK_MOUSE_DOWN" label="LINK_MOUSE_DOWN"/>
   <suffix name="LINK_TAP_UNCONFIRMED" label="LINK_TAP_UNCONFIRMED"/>
   <suffix name="LINK_TAP_DOWN" label="LINK_TAP_DOWN"/>