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

chrome/browser/ui/panels/detached_panel_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 "base/message_loop.h"
 #include "chrome/browser/ui/panels/base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/detached_panel_strip.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
@@ skipping 11 matching lines @@
 
   EXPECT_EQ(2, panel_manager->num_panels());
   EXPECT_EQ(2, detached_strip->num_panels());
 
   EXPECT_TRUE(detached_strip->HasPanel(panel1));
   EXPECT_TRUE(detached_strip->HasPanel(panel2));
 
   EXPECT_TRUE(panel1->draggable());
   EXPECT_TRUE(panel2->draggable());
 
-  EXPECT_TRUE(panel1->CanResizeByMouse());
-  EXPECT_TRUE(panel2->CanResizeByMouse());
+  EXPECT_EQ(panel::RESIZABLE_ALL_SIDES, panel1->CanResizeByMouse());
+  EXPECT_EQ(panel::RESIZABLE_ALL_SIDES, panel2->CanResizeByMouse());
 
   Panel::AttentionMode expected_attention_mode =
       static_cast<Panel::AttentionMode>(Panel::USE_PANEL_ATTENTION |
                                          Panel::USE_SYSTEM_ATTENTION);
   EXPECT_EQ(expected_attention_mode, panel1->attention_mode());
   EXPECT_EQ(expected_attention_mode, panel2->attention_mode());
 
   panel_manager->CloseAll();
 }
 
@@ skipping 92 matching lines @@
   EXPECT_FALSE(panel->IsActive());
 
   // Clicking on an inactive detached panel's titlebar activates it.
   test_panel->PressLeftMouseButtonTitlebar(panel->GetBounds().origin());
   test_panel->ReleaseMouseButtonTitlebar();
   WaitForPanelActiveState(panel, SHOW_AS_ACTIVE);
   EXPECT_FALSE(panel->IsMinimized());
 
   panel_manager->CloseAll();
 }