Remove multi-install from chrome/installer/setup.

chrome/installer/setup/installer_crash_reporting.cc

Index: chrome/installer/setup/installer_crash_reporting.cc
diff --git a/chrome/installer/setup/installer_crash_reporting.cc b/chrome/installer/setup/installer_crash_reporting.cc
index 08063a0feb4f987ea87a01e1cb8580d5bb8d223f..63e9a3e1388ebaef95f88c88bf64a0b4bc45a806 100644
--- a/chrome/installer/setup/installer_crash_reporting.cc
+++ b/chrome/installer/setup/installer_crash_reporting.cc
@@ -57,10 +57,6 @@ const char *OperationToString(InstallerState::Operation operation) {
   switch (operation) {
     case InstallerState::SINGLE_INSTALL_OR_UPDATE:
       return "single-install-or-update";
-    case InstallerState::MULTI_INSTALL:
-      return "multi-install";
-    case InstallerState::MULTI_UPDATE:
-      return "multi-update";
     case InstallerState::UNINSTALL:
       return "uninstall";
     case InstallerState::UNINITIALIZED:
@@ -149,8 +145,7 @@ void SetInitialCrashKeys(const InstallerState& state) {
   SetCrashKeyValue(kDistributionType,
                    DistributionTypeToString(state.state_type()));
   SetCrashKeyValue(kOperation, OperationToString(state.operation()));
-  SetCrashKeyValue(kIsMultiInstall,
-                   state.is_multi_install() ? "true" : "false");
+  SetCrashKeyValue(kIsMultiInstall, "false");
   SetCrashKeyValue(kIsSystemLevel, state.system_install() ? "true" : "false");
 
   const base::string16 state_key = state.state_key();