Make operators on scoped_ptr match the ones defined for std::unique_ptr

chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm

 // 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 <Carbon/Carbon.h>
 #import <Cocoa/Cocoa.h>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
@@ skipping 41 matching lines @@
 
     Panel* panel = manager->CreatePanel(panel_name, profile(),
                                         GURL(), gfx::Rect(),
                                         PanelManager::CREATE_AS_DOCKED);
     EXPECT_EQ(panels_count + 1, manager->num_panels());
 
     EXPECT_TRUE(panel);
     EXPECT_TRUE(panel->native_panel());  // Native panel is created right away.
     PanelCocoa* native_window =
         static_cast<PanelCocoa*>(panel->native_panel());
-    EXPECT_EQ(panel, native_window->panel_);  // Back pointer initialized.
+    EXPECT_EQ(panel, native_window->panel_.get());  // Back pointer initialized.
 
     PanelAnimatedBoundsObserver bounds_observer(panel);
 
     // Window should not load before Show().
     // Note: Loading the wnidow causes Cocoa to autorelease a few objects.
     // This is the reason we do this within the scope of the
     // ScopedNSAutoreleasePool.
     EXPECT_FALSE([native_window->controller_ isWindowLoaded]);
     panel->Show();
     EXPECT_TRUE([native_window->controller_ isWindowLoaded]);
@@ skipping 328 matching lines @@
   EXPECT_NSEQ(frontmostWindow, [native_window->controller_ window]);
 
   native_window2->ActivatePanel();
   chrome::testing::NSRunLoopRunAllPending();
   frontmostWindow = [[NSApp orderedWindows] objectAtIndex:0];
   EXPECT_NSEQ(frontmostWindow, [native_window2->controller_ window]);
 
   ClosePanelAndWait(panel);
   ClosePanelAndWait(panel2);
 }