3 files changed, 24 insertions, 9 deletions
diff --git a/chrome/browser/ui/browser_list.cc b/chrome/browser/ui/browser_list.cc
index ef5f75f..8ac380a 100644
--- a/chrome/browser/ui/browser_list.cc
+++ b/chrome/browser/ui/browser_list.cc
@@ -10,6 +10,7 @@
 #include "chrome/browser/ui/browser_list_impl.h"
 #include "chrome/browser/ui/browser_list_observer.h"
 #include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/host_desktop.h"
 
 using content::WebContents;
 
@@ -35,12 +36,20 @@ void BrowserList::RemoveBrowser(Browser* browser) {
 
 // static
 void BrowserList::AddObserver(chrome::BrowserListObserver* observer) {
-  GetNativeList()->AddObserver(observer);
+  for (chrome::HostDesktopType t = chrome::HOST_DESKTOP_TYPE_FIRST;
+       t < chrome::HOST_DESKTOP_TYPE_COUNT;
+       t = static_cast<chrome::HostDesktopType>(t + 1)) {
+    chrome::BrowserListImpl::GetInstance(t)->AddObserver(observer);
+  }
 }
 
 // static
 void BrowserList::RemoveObserver(chrome::BrowserListObserver* observer) {
-  GetNativeList()->RemoveObserver(observer);
+  for (chrome::HostDesktopType t = chrome::HOST_DESKTOP_TYPE_FIRST;
+       t < chrome::HOST_DESKTOP_TYPE_COUNT;
+       t = static_cast<chrome::HostDesktopType>(t + 1)) {
+    chrome::BrowserListImpl::GetInstance(t)->RemoveObserver(observer);
+  }
 }
 
 void BrowserList::CloseAllBrowsersWithProfile(Profile* profile) {
diff --git a/chrome/browser/ui/browser_list.h b/chrome/browser/ui/browser_list.h
index f3103cf..eb48b2f 100644
--- a/chrome/browser/ui/browser_list.h
+++ b/chrome/browser/ui/browser_list.h
@@ -22,12 +22,13 @@ class BrowserList {
   typedef std::vector<Browser*> BrowserVector;
   typedef BrowserVector::const_reverse_iterator const_reverse_iterator;
 
-  // Adds and removes browsers from the global list. The browser object should
-  // be valid BEFORE these calls (for the benefit of observers), so notify and
-  // THEN delete the object.
+  // Adds and removes browsers from the list they are associated with. The
+  // browser object should be valid BEFORE these calls (for the benefit of
+  // observers), so notify and THEN delete the object.
   static void AddBrowser(Browser* browser);
   static void RemoveBrowser(Browser* browser);
 
+  // Adds and removes |observer| from the observer list of each desktop.
   static void AddObserver(chrome::BrowserListObserver* observer);
   static void RemoveObserver(chrome::BrowserListObserver* observer);
 
diff --git a/chrome/browser/ui/browser_list_impl.h b/chrome/browser/ui/browser_list_impl.h
index 2801a6e..3ff167c 100644
--- a/chrome/browser/ui/browser_list_impl.h
+++ b/chrome/browser/ui/browser_list_impl.h
@@ -6,10 +6,10 @@
 #define CHROME_BROWSER_UI_BROWSER_LIST_IMPL_H_
 
 #include "base/observer_list.h"
+#include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/host_desktop.h"
 
 class Browser;
-class BrowserList;
 class Profile;
 
 namespace chrome {
@@ -33,9 +33,6 @@ class BrowserListImpl {
   void AddBrowser(Browser* browser);
   void RemoveBrowser(Browser* browser);
 
-  void AddObserver(BrowserListObserver* observer);
-  void RemoveObserver(BrowserListObserver* observer);
-
   // Called by Browser objects when their window is activated (focused).  This
   // allows us to determine what the last active Browser was.
   void SetLastActive(Browser* browser);
@@ -73,6 +70,14 @@ class BrowserListImpl {
   BrowserListImpl();
   ~BrowserListImpl();
 
+  // Only callable by BrowserList::(Add|Remove)Observer.
+  // TODO(gab): Merge BrowserListImpl into BrowserList removing the need for
+  // friend.
+  friend void BrowserList::AddObserver(chrome::BrowserListObserver*);
+  friend void BrowserList::RemoveObserver(chrome::BrowserListObserver*);
+  void AddObserver(BrowserListObserver* observer);
+  void RemoveObserver(BrowserListObserver* observer);
+
   // Helper method to remove a browser instance from a list of browsers
   void RemoveBrowserFrom(Browser* browser, BrowserVector* browser_list);