Support for interactive set-chrome-as-default in Windows.

chrome/browser/shell_integration.h

Index: chrome/browser/shell_integration.h
diff --git a/chrome/browser/shell_integration.h b/chrome/browser/shell_integration.h
index 3a0b3ab052689e444505d79ece8d3f1a2fb7df73..7d60c2bbf52c9aed548b4ea42878106f3ea2ae10 100644
--- a/chrome/browser/shell_integration.h
+++ b/chrome/browser/shell_integration.h
@@ -23,16 +23,30 @@ class ShellIntegration {
   // false if this operation fails.
   static bool SetAsDefaultBrowser();
 
+  // Initializes an OS shell flow which (if followed by the user) should set
+  // Chrome as the default browser. Returns false if the flow cannot be
+  // initialized or if it is not supported (introduced for Windows8).

[grt (UTC plus 2), 2012/05/25 20:27:38]

Windows8 -> Windows 8

[motek., 2012/05/28 17:40:33]

Done.

+  static bool StartSetAsDefaultBrowserInteractive();
+
   // Sets Chrome as the default client application for the given protocol
   // (only for the current user). Returns false if this operation fails.
   static bool SetAsDefaultProtocolClient(const std::string& protocol);
 
+  // In Windows 8 a browser can be made default-in-metro only in an interactive
+  // flow. We will distinguish between two types of permissions here to avoid
+  // forcing user into UI interaction when this should not be done.

[grt (UTC plus 2), 2012/05/25 20:27:38]

user -> the user

[motek., 2012/05/28 17:40:33]

Done.

+  enum DefaultSettingsChangePermission {
+    CHANGE_DEFAULT_NOT_ALLOWED = 0,
+    CHANGE_DEFAULT_UNATTENDED,
+    CHANGE_DEFAULT_INTERACTIVE,
+  };
+
   // Returns true if the running browser can be set as the default browser.

[grt (UTC plus 2), 2012/05/25 20:27:38]

update comment.  suggest something like: "Returns requirements for making the
running browser the user's default." or something like that.

[motek., 2012/05/28 17:40:33]

Done.

-  static bool CanSetAsDefaultBrowser();
+  static DefaultSettingsChangePermission CanSetAsDefaultBrowser();
 
   // Returns true if the running browser can be set as the default client

[grt (UTC plus 2), 2012/05/25 20:27:38]

here, too

[motek., 2012/05/28 17:40:33]

Done.

   // application for specific protocols.
-  static bool CanSetAsDefaultProtocolClient();
+  static DefaultSettingsChangePermission CanSetAsDefaultProtocolClient();
 
   // On Linux, it may not be possible to determine or set the default browser
   // on some desktop environments or configurations. So, we use this enum and