Refactor Win panel mouse watcher to use PanelMouseWatcher base class.

chrome/browser/ui/panels/panel_browser_view.cc

Index: chrome/browser/ui/panels/panel_browser_view.cc
===================================================================
--- chrome/browser/ui/panels/panel_browser_view.cc	(revision 102599)
+++ chrome/browser/ui/panels/panel_browser_view.cc	(working copy)
@@ -8,7 +8,7 @@
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_browser_frame_view.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
-#include "chrome/browser/ui/panels/panel_mouse_watcher_win.h"
+#include "chrome/browser/ui/panels/panel_mouse_watcher.h"
 #include "chrome/browser/ui/views/frame/browser_frame.h"
 #include "grit/chromium_strings.h"
 #include "ui/base/animation/slide_animation.h"
@@ -51,6 +51,8 @@
 }
 
 PanelBrowserView::~PanelBrowserView() {
+  if (PanelMouseWatcher::GetInstance()->IsSubscribed(this))
+    PanelMouseWatcher::GetInstance()->RemoveSubscriber(this);
 }
 
 void PanelBrowserView::Init() {
@@ -70,12 +72,6 @@
     bounds_animator_.reset();
 
   ::BrowserView::Close();
-
-  // Stop the global mouse watcher only if we do not have any panels up.
-#if defined(OS_WIN)
-  if (panel_->manager()->num_panels() == 1)
-    StopMouseWatcher();
-#endif
 }
 
 bool PanelBrowserView::CanResize() const {
@@ -215,6 +211,7 @@
   int height;
   switch (expansion_state) {
     case Panel::EXPANDED:
+      PanelMouseWatcher::GetInstance()->RemoveSubscriber(this);
       height = restored_height_;
       break;
     case Panel::TITLE_ONLY:
@@ -222,12 +219,7 @@
       break;
     case Panel::MINIMIZED:
       height = PanelManager::minimized_panel_height();
-
-      // Start the mouse watcher so that we can bring up the minimized panels.
-      // TODO(jianli): Need to support mouse watching in ChromeOS.
-#if defined(OS_WIN)
-      EnsureMouseWatcherStarted();
-#endif
+      PanelMouseWatcher::GetInstance()->AddSubscriber(this);
       break;
     default:
       NOTREACHED();
@@ -480,7 +472,7 @@
 
 // static
 PanelMouseWatcher* NativePanelTesting::GetPanelMouseWatcherInstance() {
-  return NULL;
+  return PanelMouseWatcher::GetInstance();
 }
 
 NativePanelTestingWin::NativePanelTestingWin(
@@ -516,10 +508,10 @@
 
 void NativePanelTestingWin::SetMousePositionForMinimizeRestore(
     const gfx::Point& hover_point) {
-  NOTIMPLEMENTED();
+  PanelMouseWatcher::GetInstance()->HandleMouseMovement(hover_point);
+  MessageLoopForUI::current()->RunAllPending();
 }
 
 int NativePanelTestingWin::TitleOnlyHeight() const {
-  NOTIMPLEMENTED();
-  return -1;
+  return panel_browser_view_->GetFrameView()->NonClientTopBorderHeight();
 }