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

chrome/browser/ui/cocoa/browser_window_controller.mm

 // Copyright 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 
 #include "base/command_line.h"
@@ skipping 591 matching lines @@
     [[self window] orderOut:self];
     return NO;
   }
 
   // the tab strip is empty, it's ok to close the window
   return YES;
 }
 
 // Called right after our window became the main window.
 - (void)windowDidBecomeMain:(NSNotification*)notification {
-  if (chrome::GetLastActiveBrowser() != browser_) {
+  if (chrome::GetLastActiveBrowser() != browser_.get()) {
     BrowserList::SetLastActive(browser_.get());
   }
   // Always saveWindowPositionIfNeeded when becoming main, not just
   // when |browser_| is not the last active browser. See crbug.com/536280 .
   [self saveWindowPositionIfNeeded];
 
   NSView* rootView = [[[self window] contentView] superview];
   [rootView cr_recursivelyInvokeBlock:^(id view) {
       if ([view conformsToProtocol:@protocol(ThemedWindowDrawing)])
         [view windowDidChangeActive];
@@ skipping 1455 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isTabbedWindow {
   return browser_->is_type_tabbed();
 }
 
 @end  // @implementation BrowserWindowController(WindowType)