Valgrind/Heapchecker: Fix leak from r149099.

chrome/browser/chromeos/disks/mock_disk_mount_manager.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/chromeos/disks/mock_disk_mount_manager.h"
 
+#include <utility>
+
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 using testing::_;
 using testing::AnyNumber;
 using testing::Invoke;
 using testing::ReturnRef;
@@ skipping 149 matching lines @@
                                           std::string(),  // drive_label
                                           device_id,  // fs_uuid
                                           std::string(),  // system_path_prefix
                                           DEVICE_TYPE_USB,  // device_type
                                           1073741824,  // total_size_in_bytes
                                           false,  // is_parent
                                           false,  // is_read_only
                                           true,  // has_media
                                           false,  // on_boot_device
                                           false);  // is_hidden
-  disks_.insert(std::pair<std::string, DiskMountManager::Disk*>(
-      std::string(mount_info.source_path), disk));
+  DiskMountManager::DiskMap::iterator it = disks_.find(mount_info.source_path);
+  if (it == disks_.end()) {
+    disks_.insert(std::make_pair(std::string(mount_info.source_path), disk));
+  } else {
+    delete it->second;
+    it->second = disk;
+  }
 }
 
 void MockDiskMountManager::RemoveDiskEntryForMountDevice(
     const DiskMountManager::MountPointInfo& mount_info) {
   DiskMountManager::DiskMap::iterator it = disks_.find(mount_info.source_path);
   if (it != disks_.end()) {
     delete it->second;
     disks_.erase(it);
   }
 }
 
-void MockDiskMountManager::NotifyDiskChanged(DiskMountManagerEventType event,
-                                             const DiskMountManager::Disk* disk)
-{
+void MockDiskMountManager::NotifyDiskChanged(
+    DiskMountManagerEventType event,
+    const DiskMountManager::Disk* disk) {
   // Make sure we run on UI thread.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   FOR_EACH_OBSERVER(Observer, observers_, DiskChanged(event, disk));
 }
 
 void MockDiskMountManager::NotifyDeviceChanged(DiskMountManagerEventType event,
                                                const std::string& path) {
   // Make sure we run on UI thread.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   FOR_EACH_OBSERVER(Observer, observers_, DeviceChanged(event, path));
 }
 
 }  // namespace disks
 }  // namespace chromeos