Implementing --app-launcher install/uninstall flow.

chrome/installer/util/installer_state.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_INSTALLER_UTIL_INSTALLER_STATE_H_
 #define CHROME_INSTALLER_UTIL_INSTALLER_STATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 55 matching lines @@
     UNINSTALL
   };
 
   // Constructs an uninitialized instance; see Initialize().
   InstallerState();
 
   // Constructs an initialized but empty instance.
   explicit InstallerState(Level level);
 
   // Initializes this object based on the current operation.
-  void Initialize(const CommandLine& command_line,
+  // Returns false iff conflicting options are found.
+  bool Initialize(const CommandLine& command_line,
                   const MasterPreferences& prefs,
                   const InstallationState& machine_state);
 
   // Adds a product constructed on the basis of |state|, setting this object's
   // msi flag if |state| is msi-installed.  Returns the product that was added,
   // or NULL if |state| is incompatible with this object.  Ownership is not
   // passed to the caller.
   Product* AddProductFromState(BrowserDistribution::Type type,
                                const ProductState& state);
 
@@ skipping 154 matching lines @@
   bool verbose_logging_;
   bool ensure_google_update_present_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InstallerState);
 };  // class InstallerState
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_UTIL_INSTALLER_STATE_H_