Remove some dead app host code.

chrome/installer/setup/uninstall.cc

Index: chrome/installer/setup/uninstall.cc
diff --git a/chrome/installer/setup/uninstall.cc b/chrome/installer/setup/uninstall.cc
index 146359fd05f1d4bc412ef31bddd62a705c045c54..0558b78a380df0a46d482a7fccfdbbd52d8312d8 100644
--- a/chrome/installer/setup/uninstall.cc
+++ b/chrome/installer/setup/uninstall.cc
@@ -26,7 +26,6 @@
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_result_codes.h"
-#include "chrome/installer/launcher_support/chrome_launcher_support.h"
 #include "chrome/installer/setup/install.h"
 #include "chrome/installer/setup/install_worker.h"
 #include "chrome/installer/setup/setup_constants.h"
@@ -1282,23 +1281,14 @@ InstallStatus UninstallProduct(const InstallationState& original_state,
     // TODO(huangs): Implement actual migration code and remove the hack below.
     // Remove the "shadow" App Launcher registry keys.
     if (installer_state.is_multi_install()) {
-      // If we're not uninstalling the legacy App Launcher, and if it was

[gab, 2014/07/25 12:25:13]

The "legacy App Launcher" never shipped beyond Dev, is that correct?

[grt (UTC plus 2), 2014/07/25 14:20:27]

i don't really know. my understand is this (sam: please correct me if i'm
wrong): if someone somehow still has it on their system, then something has gone
horribly wrong. i can't imagine how leaving the shadow registry key behind on
chrome uninstall would be the right thing.

now that i look at it, i think it's wrong for any operations on the shadow
registry key (which is used for counting uses of the app list) to be conditional
on chrome being multi-install. i've added a TODO to fix this.

-      // not installed in the first place, then delete the "shadow" keys.
-      chrome_launcher_support::InstallationState level_to_check =
-          installer_state.system_install() ?
-              chrome_launcher_support::INSTALLED_AT_SYSTEM_LEVEL :
-              chrome_launcher_support::INSTALLED_AT_USER_LEVEL;
-      bool has_legacy_app_launcher = level_to_check ==
-          chrome_launcher_support::GetAppLauncherInstallationState();
-      if (!has_legacy_app_launcher) {
-        BrowserDistribution* shadow_app_launcher_dist =
-            BrowserDistribution::GetSpecificDistribution(
-                BrowserDistribution::CHROME_APP_HOST);
-        InstallUtil::DeleteRegistryKey(
-            reg_root,
-            shadow_app_launcher_dist->GetVersionKey(),
-            KEY_WOW64_32KEY);
-      }
+      // Delete the "shadow" keys.
+      BrowserDistribution* shadow_app_launcher_dist =
+          BrowserDistribution::GetSpecificDistribution(
+              BrowserDistribution::CHROME_APP_HOST);
+      InstallUtil::DeleteRegistryKey(
+          reg_root,
+          shadow_app_launcher_dist->GetVersionKey(),
+          KEY_WOW64_32KEY);
     }
   }