Convert PanelMouseWatcher to have more than one observer.

BUG=None
TEST=PanelMouseWatcherTest.*


Review URL: http://codereview.chromium.org/8677031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111864 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 17 insertions, 3 deletions

diff --git a/chrome/browser/ui/panels/panel_mouse_watcher.cc b/chrome/browser/ui/panels/panel_mouse_watcher.cc
index dc2ab15..b55ca76 100644
--- a/chrome/browser/ui/panels/panel_mouse_watcher.cc
+++ b/chrome/browser/ui/panels/panel_mouse_watcher.cc
@@ -4,15 +4,29 @@
 
 #include "chrome/browser/ui/panels/panel_mouse_watcher.h"
 
+#include "chrome/browser/ui/panels/panel_mouse_watcher_observer.h"
 #include "ui/gfx/point.h"
 
-PanelMouseWatcher::PanelMouseWatcher(Observer* observer)
-    : observer_(observer) {
+PanelMouseWatcher::PanelMouseWatcher() {
 }
 
 PanelMouseWatcher::~PanelMouseWatcher() {
 }
 
+void PanelMouseWatcher::AddObserver(PanelMouseWatcherObserver* observer) {
+  observers_.AddObserver(observer);
+  if (observers_.size() == 1)
+    Start();
+}
+
+void PanelMouseWatcher::RemoveObserver(PanelMouseWatcherObserver* observer) {
+  DCHECK(observers_.HasObserver(observer));
+  observers_.RemoveObserver(observer);
+  if (observers_.size() == 0)
+    Stop();
+}
+
 void PanelMouseWatcher::NotifyMouseMovement(const gfx::Point& mouse_position) {
-  observer_->OnMouseMove(mouse_position);
+  FOR_EACH_OBSERVER(PanelMouseWatcherObserver, observers_,
+                    OnMouseMove(mouse_position));
 }