Remove some dead app host code.

chrome/installer/launcher_support/chrome_launcher_support.h

Index: chrome/installer/launcher_support/chrome_launcher_support.h
diff --git a/chrome/installer/launcher_support/chrome_launcher_support.h b/chrome/installer/launcher_support/chrome_launcher_support.h
index f50ff28a30f8af36f14c5030d5c8e90993fbdff4..7b20c198af2eeff14e3024b92678685ea49e2611 100644
--- a/chrome/installer/launcher_support/chrome_launcher_support.h
+++ b/chrome/installer/launcher_support/chrome_launcher_support.h
@@ -16,15 +16,6 @@ enum InstallationLevel {
   SYSTEM_LEVEL_INSTALLATION,
 };
 
-enum InstallationState {
-  NOT_INSTALLED,
-  INSTALLED_AT_USER_LEVEL,
-  INSTALLED_AT_SYSTEM_LEVEL,
-};
-
-// The app GUID for Chrome App Launcher.
-extern const wchar_t kAppLauncherGuid[];
-
 // Returns the path to an existing setup.exe at the specified level, if it can
 // be found via Omaha client state.
 base::FilePath GetSetupExeForInstallationLevel(InstallationLevel level);
@@ -35,10 +26,6 @@ base::FilePath GetSetupExeForInstallationLevel(InstallationLevel level);
 // exists.
 base::FilePath GetChromePathForInstallationLevel(InstallationLevel level);
 
-// Returns the path to an installed app_host.exe at the specified level, if
-// it can be found via Omaha client state.
-base::FilePath GetAppHostPathForInstallationLevel(InstallationLevel level);
-
 // Returns the path to an installed SxS chrome.exe at the specified level, if
 // it can be found via Omaha client state.
 base::FilePath GetChromeSxSPathForInstallationLevel(InstallationLevel level);
@@ -49,34 +36,12 @@ base::FilePath GetChromeSxSPathForInstallationLevel(InstallationLevel level);
 // The file path returned (if any) is guaranteed to exist.
 base::FilePath GetAnyChromePath();
 
-// Returns the path to an installed app_host.exe, or an empty path. Prefers a
-// system-level installation to a user-level installation. Uses Omaha client
-// state to identify a App Host installation location.
-// The file path returned (if any) is guaranteed to exist.
-base::FilePath GetAnyAppHostPath();
-
 // Returns the path to an installed SxS chrome.exe, or an empty path. Prefers a
 // user-level installation to a system-level installation. Uses Omaha client
 // state to identify a Chrome Canary installation location.
 // The file path returned (if any) is guaranteed to exist.
 base::FilePath GetAnyChromeSxSPath();
 
-// Uninstalls the legacy app launcher by launching setup.exe with the uninstall
-// arguments from the App Launcher ClientState registry key. The uninstall will
-// run asynchronously.
-void UninstallLegacyAppLauncher(InstallationLevel level);
-
-// Returns true if App Host is installed (system-level or user-level),
-// or in the same directory as the current executable.
-bool IsAppHostPresent();
-
-// Returns the app launcher installation state. If the launcher is installed
-// at both system level and user level, system level is returned.
-InstallationState GetAppLauncherInstallationState();
-
-// Returns true if App Launcher is installed (system-level or user-level).
-bool IsAppLauncherPresent();
-
 // Returns true if the Chrome browser is installed (system-level or user-level).
 // If this is running in an official build, it will check if a non-canary build
 // if installed. If it is not an official build, it will always return true.