Enable user resizing for docked Panels (GTK and Mac).

chrome/browser/ui/panels/panel_browser_window_gtk.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/panels/panel_browser_window_gtk.h"
 
 #include "base/bind.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/gtk/browser_titlebar.h"
 #include "chrome/browser/ui/panels/panel.h"
@@ skipping 91 matching lines @@
       this,
       chrome::NOTIFICATION_WINDOW_CLOSED,
       content::Source<GtkWindow>(window()));
 }
 
 bool PanelBrowserWindowGtk::GetWindowEdge(int x, int y, GdkWindowEdge* edge) {
   // Only detect the window edge when panels can be resized by the user.
   // This method is used by the base class to detect when the cursor has
   // hit the window edge in order to change the cursor to a resize cursor
   // and to detect when to initiate a resize drag.
-  return panel_->CanResizeByMouse() ?
-    BrowserWindowGtk::GetWindowEdge(x, y, edge) : FALSE;
+  panel::Resizability resizability = panel_->CanResizeByMouse();
+  if (panel::NOT_RESIZABLE == resizability)
+    return false;
+
+  if (!BrowserWindowGtk::GetWindowEdge(x, y, edge))
+    return FALSE;
+
+  // Special handling if bottom edge is not resizable.
+  if (panel::ALL_SIDES_EXCEPT_BOTTOM == resizability) {
+    if (*edge == GDK_WINDOW_EDGE_SOUTH)
+      return FALSE;
+    if (*edge == GDK_WINDOW_EDGE_SOUTH_WEST)
+      *edge = GDK_WINDOW_EDGE_WEST;
+    else if (*edge == GDK_WINDOW_EDGE_SOUTH_EAST)
+      *edge = GDK_WINDOW_EDGE_EAST;
+  }
+
+  return TRUE;
 }
 
 void PanelBrowserWindowGtk::EnsureDragHelperCreated() {
   if (drag_helper_.get())
     return;
 
   drag_helper_.reset(new PanelDragGtk(panel_.get()));
   gtk_box_pack_end(GTK_BOX(window_vbox_), drag_helper_->widget(),
                    FALSE, FALSE, 0);
 }
@@ skipping 806 matching lines @@
     MessageLoopForUI::current()->RunAllPending();
 }
 
 bool NativePanelTestingGtk::IsWindowSizeKnown() const {
   return !panel_browser_window_gtk_->frame_size_.IsEmpty();
 }
 
 bool NativePanelTestingGtk::IsAnimatingBounds() const {
   return panel_browser_window_gtk_->IsAnimatingBounds();
 }