Remove multi-install from chrome/installer/setup.

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 57417158899264c61080b9baaedae35087cf57af..5b4b9176bf6fc1df0519ec8af376069ef28fce6a 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -60597,6 +60597,41 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Setup.Install.DeleteAppHost" enum="BooleanDeletedOrNot">
+  <owner>grt@chromium.org</owner>
+  <summary>
+    Hit following a successful install or update when the legacy
+    &quot;app_host.exe&quot; binary is deleted from the filesystem.
+  </summary>
+</histogram>
+
+<histogram name="Setup.Install.DeleteAppLauncherClientsKey"
+    enum="BooleanDeletedOrNot">
+  <owner>grt@chromium.org</owner>
+  <summary>
+    Hit following a successful install or update when the legacy &quot;app
+    launcher&quot; Clients key is deleted from the registry.
+  </summary>
+</histogram>
+
+<histogram name="Setup.Install.DeleteBinariesClientsKey"
+    enum="BooleanDeletedOrNot">
+  <owner>grt@chromium.org</owner>
+  <summary>
+    Hit following a successful install or update when the legacy
+    &quot;binaries&quot; Clients key is deleted from the registry.
+  </summary>
+</histogram>
+
+<histogram name="Setup.Install.DeleteInstallExtensionCommand"
+    enum="BooleanDeletedOrNot">
+  <owner>grt@chromium.org</owner>
+  <summary>
+    Hit following a successful install or update when the legacy
+    &quot;install-extension&quot; app command is deleted from the registry.
+  </summary>
+</histogram>
+
 <histogram name="Setup.Install.HasArchivePatch" enum="Boolean">
   <owner>grt@chromium.org</owner>
   <summary>
@@ -60618,6 +60653,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Record the status of unpacking the contents of a 7z file.</summary>
 </histogram>
 
+<histogram name="Setup.Install.MultiChromeFrameRemoved"
+    enum="MultiChromeFrameRemovalResult">
+  <owner>grt@chromium.org</owner>
+  <summary>
+    Hit following a successful install or update when data from a legacy
+    multi-install Chrome Frame is deleted from the registry.
+  </summary>
+</histogram>
+
 <histogram name="Setup.Install.NumDeleteOldVersionsAttemptsBeforeAbort"
     units="Attempts">
   <owner>fdoray@chromium.org</owner>
@@ -96301,6 +96345,14 @@ value.
   <int value="8" label="DEFAULT_ACCOUNT_FIRST_USER_REJECTED_UPDATE"/>
 </enum>
 
+<enum name="MultiChromeFrameRemovalResult" type="int">
+  <int value="0" label="ALL_FAILED">All removal operations failed.</int>
+  <int value="1" label="PARTIAL_SUCCESS">
+    Some, but not all, operations succeeded.
+  </int>
+  <int value="2" label="SUCCESS">All operations succeeded.</int>
+</enum>
+
 <enum name="MultiProfileSessionMode" type="int">
   <int value="0" label="Single user mode"/>
   <int value="1" label="Side by side mode"/>