DefaultBrowserWorker now fully supports opening the settings for Win10

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 e71dbfed73fc4b1031f31c99b648f8dc9751cb5e..11168a716c3b187a3a5f55efe948525e42cdc897 100644
--- a/chrome/browser/shell_integration.h
+++ b/chrome/browser/shell_integration.h
@@ -34,6 +34,12 @@ bool SetAsDefaultBrowser();
 // shown and this method returns true.
 bool SetAsDefaultBrowserInteractive();
 
+// Initiates the interaction with the system settings for the default browser.
+// The function takes care of making sure |on_finished_callback| will get called
+// exactly once when the interaction is finished.
+void SetAsDefaultBrowserUsingSystemSettings(
+    const base::Closure& on_finished_callback);
+
 // Sets Chrome as the default client application for the given protocol
 // (only for the current user). Returns false if this operation fails.
 bool SetAsDefaultProtocolClient(const std::string& protocol);
@@ -56,6 +62,8 @@ enum DefaultWebClientSetPermission {
   SET_DEFAULT_UNATTENDED,
   // On Windows 8, a browser can be made default only in an interactive flow.
   SET_DEFAULT_INTERACTIVE,
+  // On Windows 10+, the system settings page for default apps is opened.
+  SET_DEFAULT_OPEN_SETTINGS,
 };
 
 // Returns requirements for making the running browser the user's default.
@@ -232,7 +240,11 @@ class DefaultWebClientWorker
 
   // Implementation of CheckIsDefault() and SetAsDefault() for subclasses.
   virtual DefaultWebClientState CheckIsDefaultImpl() = 0;
-  virtual void SetAsDefaultImpl() = 0;
+
+  // The callback may be run synchronously or at an arbitrary time later on this
+  // thread.
+  // Note : Subclasses MUST make sure |on_finished_callback| is execute.
+  virtual void SetAsDefaultImpl(const base::Closure& on_finished_callback) = 0;
 
   // Reports the result for the set-as-default operation.
   void ReportSetDefaultResult(DefaultWebClientState state);
@@ -268,7 +280,7 @@ class DefaultBrowserWorker : public DefaultWebClientWorker {
   DefaultWebClientState CheckIsDefaultImpl() override;
 
   // Set Chrome as the default browser.
-  void SetAsDefaultImpl() override;
+  void SetAsDefaultImpl(const base::Closure& on_finished_callback) override;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultBrowserWorker);
 };
@@ -292,7 +304,7 @@ class DefaultProtocolClientWorker : public DefaultWebClientWorker {
   DefaultWebClientState CheckIsDefaultImpl() override;
 
   // Set Chrome as the default handler for this protocol.
-  void SetAsDefaultImpl() override;
+  void SetAsDefaultImpl(const base::Closure& on_finished_callback) override;
 
   std::string protocol_;