[Mac] Honor modifier keys in back/forward menu.

Add a method ActivatedAtWithDisposition to BackForwardMenuModel that navigates to a history item with a certain window disposition (current tab, new background/foreground tab).

Change BackForwardMenuController to call ActivatedAtWithDisposition with the disposition created from the current NSEvent.

Also, factor out some common code in Browser::GoBack and GoForward.

BUG=37984
TEST=Navigate to a history item in the back/forward menu while holding down the command key. The item should open in a new tab. Likewise, holding down cmd-shift should open it in a new foreground tab.

Review URL: http://codereview.chromium.org/910001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@41875 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 0 deletions

diff --git a/chrome/browser/browser.h b/chrome/browser/browser.h
index 0082504..37e62505 100644
--- a/chrome/browser/browser.h
+++ b/chrome/browser/browser.h
@@ -349,6 +349,10 @@ class Browser : public TabStripModelDelegate,
   // Returns true if a tab can be restored.
   virtual bool CanRestoreTab();
 
+  // Navigate to an index in the tab history, opening a new tab depending on the
+  // disposition.
+  bool NavigateToIndexWithDisposition(int index, WindowOpenDisposition disp);
+
   // Show a given a URL. If a tab with the same URL (ignoring the ref) is
   // already visible in this browser, it becomes selected. Otherwise a new tab
   // is created.
@@ -797,6 +801,11 @@ class Browser : public TabStripModelDelegate,
   // Shared code between Reload() and ReloadAll().
   void ReloadInternal(bool ignore_cache);
 
+  // Depending on the disposition, return the |NavigationController| for the
+  // current tab or clone the current tab and return its |NavigationController|.
+  NavigationController& GetOrCloneNavigationControllerForDisposition(
+       WindowOpenDisposition disp);
+
   // Data members /////////////////////////////////////////////////////////////
 
   NotificationRegistrar registrar_;