Stop passing raw pointers to base::Value API in c/b/chromeos and c/b/extensions

chrome/browser/extensions/extension_web_ui.cc

Index: chrome/browser/extensions/extension_web_ui.cc
diff --git a/chrome/browser/extensions/extension_web_ui.cc b/chrome/browser/extensions/extension_web_ui.cc
index e5d3b8ae6e82c7243a46e815a978cf57dc45bcfc..9ebeb1c52b5fbc1eed888b143600a0f5d4cc3d81 100644
--- a/chrome/browser/extensions/extension_web_ui.cc
+++ b/chrome/browser/extensions/extension_web_ui.cc
@@ -15,6 +15,7 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
+#include "base/values.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
@@ -471,12 +472,14 @@ void ExtensionWebUI::RegisterOrActivateChromeURLOverrides(
   DictionaryPrefUpdate update(prefs, kExtensionURLOverrides);
   base::DictionaryValue* all_overrides = update.Get();
   for (const auto& page_override_pair : overrides) {
-    base::ListValue* page_overrides = nullptr;
-    if (!all_overrides->GetList(page_override_pair.first, &page_overrides)) {
-      page_overrides = new base::ListValue();
-      all_overrides->Set(page_override_pair.first, page_overrides);
+    base::ListValue* page_overrides_weak = nullptr;
+    if (!all_overrides->GetList(page_override_pair.first,
+                                &page_overrides_weak)) {
+      auto page_overrides = base::MakeUnique<base::ListValue>();
+      page_overrides_weak = page_overrides.get();
+      all_overrides->Set(page_override_pair.first, std::move(page_overrides));
     }
-    AddOverridesToList(page_overrides, page_override_pair.second.spec());
+    AddOverridesToList(page_overrides_weak, page_override_pair.second.spec());
   }
 }