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

chrome/browser/ui/panels/panel_overflow_browsertest.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 <vector>
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/panels/base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/docked_panel_strip.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/panels/overflow_panel_strip.h"
@@ skipping 232 matching lines @@
   EXPECT_TRUE(panel1->draggable());
   EXPECT_TRUE(panel2->draggable());
   EXPECT_TRUE(panel3->draggable());
   EXPECT_FALSE(panel4->draggable());
 
   EXPECT_EQ(Panel::USE_PANEL_ATTENTION, panel1->attention_mode());
   EXPECT_EQ(Panel::USE_PANEL_ATTENTION, panel2->attention_mode());
   EXPECT_EQ(Panel::USE_PANEL_ATTENTION, panel3->attention_mode());
   EXPECT_EQ(Panel::USE_PANEL_ATTENTION, panel4->attention_mode());
 
-  EXPECT_FALSE(panel1->CanResizeByMouse());
-  EXPECT_FALSE(panel2->CanResizeByMouse());
-  EXPECT_FALSE(panel3->CanResizeByMouse());
-  EXPECT_FALSE(panel4->CanResizeByMouse());
+  EXPECT_EQ(panel::RESIZABLE_ALL_SIDES_EXCEPT_BOTTOM,
+            panel1->CanResizeByMouse());
+  EXPECT_EQ(panel::RESIZABLE_ALL_SIDES_EXCEPT_BOTTOM,
+            panel2->CanResizeByMouse());
+  EXPECT_EQ(panel::RESIZABLE_ALL_SIDES_EXCEPT_BOTTOM,
+            panel3->CanResizeByMouse());
+  EXPECT_EQ(panel::NOT_RESIZABLE, panel4->CanResizeByMouse());
 
   // Make sure last panel really did overflow.
   WaitForLayoutModeChanged(panel4, PanelStrip::IN_OVERFLOW);
   EXPECT_FALSE(panel4->has_temporary_layout());
   EXPECT_FALSE(panel4->draggable());
   EXPECT_EQ(Panel::USE_PANEL_ATTENTION, panel4->attention_mode());
 
   PanelManager::GetInstance()->CloseAll();
 }
 
@@ skipping 1519 matching lines @@
   // End full screen mode, expansion occurs again.
   overflow_strip->OnFullScreenModeChanged(false);
   EXPECT_TRUE(panel_manager->mouse_watcher()->IsActive());
   MoveMouse(in_overflow_area);
   EXPECT_GT(overflow_strip->current_display_width(), iconified_width);
   MoveMouse(beyond_overflow_area);
   EXPECT_EQ(iconified_width, overflow_strip->current_display_width());
 
   panel_manager->CloseAll();
 }