ObserverList::HasObserver now takes a const pointer.

chrome/browser/ui/ash/screenshot_taker.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/ash/screenshot_taker.h"
 
 #include <climits>
 #include <string>
 
 #include "ash/shell.h"
@@ skipping 517 matching lines @@
 }
 
 void ScreenshotTaker::AddObserver(ScreenshotTakerObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void ScreenshotTaker::RemoveObserver(ScreenshotTakerObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
-bool ScreenshotTaker::HasObserver(ScreenshotTakerObserver* observer) const {
+bool ScreenshotTaker::HasObserver(
+    const ScreenshotTakerObserver* observer) const {
   return observers_.HasObserver(observer);
 }
 
 void ScreenshotTaker::GrabWindowSnapshotAsyncCallback(
     base::FilePath screenshot_path,
     bool is_partial,
     int window_idx,
     scoped_refptr<base::RefCountedBytes> png_data) {
   if (!png_data.get()) {
     if (is_partial) {
@@ skipping 69 matching lines @@
 }
 
 void ScreenshotTaker::SetScreenshotBasenameForTest(
     const std::string& basename) {
   screenshot_basename_for_test_ = basename;
 }
 
 void ScreenshotTaker::SetScreenshotProfileForTest(Profile* profile) {
   profile_for_test_ = profile;
 }