Add PanelOverflowStrip to handle panel overflow.

chrome/browser/ui/panels/panel_manager.cc

Index: chrome/browser/ui/panels/panel_manager.cc
diff --git a/chrome/browser/ui/panels/panel_manager.cc b/chrome/browser/ui/panels/panel_manager.cc
index 6137a6b4870e90fbaee319c7307b3ec44bfff1b6..99acbf9ebcbd93eca537838ef306cdc7a20f4935 100644
--- a/chrome/browser/ui/panels/panel_manager.cc
+++ b/chrome/browser/ui/panels/panel_manager.cc
@@ -9,6 +9,7 @@
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/panels/panel_mouse_watcher.h"
+#include "chrome/browser/ui/panels/panel_overflow_strip.h"
 #include "chrome/browser/ui/panels/panel_strip.h"
 #include "chrome/browser/ui/window_sizer.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -37,6 +38,7 @@ PanelManager::PanelManager()
     : panel_mouse_watcher_(PanelMouseWatcher::Create()),
       auto_sizing_enabled_(true) {
   panel_strip_.reset(new PanelStrip(this));
+  panel_overflow_strip_.reset(new PanelOverflowStrip(this));
   auto_hiding_desktop_bar_ = AutoHidingDesktopBar::Create(this);
   OnDisplayChanged();
 }
@@ -77,6 +79,10 @@ void PanelManager::Layout() {
                                kPanelStripLeftMargin - kPanelStripRightMargin);
   panel_strip_bounds.set_height(height);
   panel_strip_->SetDisplayArea(panel_strip_bounds);
+
+  gfx::Rect overflow_area(adjusted_work_area_);
+  overflow_area.set_width(kOverflowStripThickness);
+  panel_overflow_strip_->SetDisplayArea(overflow_area);
 }
 
 Panel* PanelManager::CreatePanel(Browser* browser) {
@@ -100,7 +106,7 @@ int PanelManager::StartingRightPosition() const {
 void PanelManager::Remove(Panel* panel) {
   if (panel_strip_->Remove(panel))
     return;
-  // TODO(jianli): else try removing from overflow strip
+  panel_overflow_strip_->Remove(panel);
 }
 
 void PanelManager::OnPanelRemoved(Panel* panel) {
@@ -123,8 +129,11 @@ void PanelManager::EndDragging(bool cancelled) {
 }
 
 void PanelManager::OnPanelExpansionStateChanged(
-    Panel::ExpansionState old_state, Panel::ExpansionState new_state) {
-  panel_strip_->OnPanelExpansionStateChanged(old_state, new_state);
+    Panel* panel, Panel::ExpansionState old_state) {
+  if (panel->expansion_state() == Panel::IN_OVERFLOW)
+    panel_overflow_strip_->OnPanelExpansionStateChanged(panel, old_state);
+  else
+    panel_strip_->OnPanelExpansionStateChanged(panel, old_state);
 }
 
 void PanelManager::OnPreferredWindowSizeChanged(
@@ -159,11 +168,6 @@ void PanelManager::AdjustWorkAreaForAutoHidingDesktopBars() {
   }
 }
 
-int PanelManager::GetBottomPositionForExpansionState(
-    Panel::ExpansionState expansion_state) const {
-  return panel_strip_->GetBottomPositionForExpansionState(expansion_state);
-}
-
 BrowserWindow* PanelManager::GetNextBrowserWindowToActivate(
     Panel* panel) const {
   // Find the last active browser window that is not minimized.
@@ -178,10 +182,6 @@ BrowserWindow* PanelManager::GetNextBrowserWindowToActivate(
   return NULL;
 }
 
-void PanelManager::MoveToOverflowStrip(Panel* panel, bool is_new) {
-  // TODO(jianli) - implement.
-}
-
 void PanelManager::OnAutoHidingDesktopBarThicknessChanged() {
   AdjustWorkAreaForAutoHidingDesktopBars();
   Layout();
@@ -195,12 +195,11 @@ void PanelManager::OnAutoHidingDesktopBarVisibilityChanged(
 
 void PanelManager::RemoveAll() {
   panel_strip_->RemoveAll();
-  // TODO(jianli): overflow_strip_->RemoveAll();
+  panel_overflow_strip_->RemoveAll();
 }
 
 int PanelManager::num_panels() const {
-  return panel_strip_->num_panels();
-  // TODO(jianli): + overflow_strip_->num_panels();
+  return panel_strip_->num_panels()+ panel_overflow_strip_->num_panels();
 }
 
 bool PanelManager::is_dragging_panel() const {