Change panel drag related methods to use mouse location in screen coordinates.

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 8b06ce79feeb9c66b9d008c28f5864f5d8e9a67f..70c9f41f9c86599dabf3b5b0e7bb66fd1ee08d88 100644
--- a/chrome/browser/ui/panels/panel_manager.cc
+++ b/chrome/browser/ui/panels/panel_manager.cc
@@ -155,12 +155,13 @@ void PanelManager::OnPanelClosed(Panel* panel) {
       content::NotificationService::NoDetails());
 }
 
-void PanelManager::StartDragging(Panel* panel) {
-  drag_controller_->StartDragging(panel);
+void PanelManager::StartDragging(Panel* panel,
+                                 const gfx::Point& mouse_location) {
+  drag_controller_->StartDragging(panel, mouse_location);
 }
 
-void PanelManager::Drag(int delta_x, int delta_y) {
-  drag_controller_->Drag(delta_x, delta_y);
+void PanelManager::Drag(const gfx::Point& mouse_location) {
+  drag_controller_->Drag(mouse_location);
 }
 
 void PanelManager::EndDragging(bool cancelled) {