Run clang-modernize -use-nullptr over src/extensions/.

extensions/common/manifest_handlers/webview_info.cc

Index: extensions/common/manifest_handlers/webview_info.cc
diff --git a/extensions/common/manifest_handlers/webview_info.cc b/extensions/common/manifest_handlers/webview_info.cc
index 3b30bbe421581a12afd208fac8c77dc643a27bea..9f780e60750e4c76dbd3737258ecd3312fb12eac 100644
--- a/extensions/common/manifest_handlers/webview_info.cc
+++ b/extensions/common/manifest_handlers/webview_info.cc
@@ -104,14 +104,14 @@ WebviewHandler::~WebviewHandler() {
 bool WebviewHandler::Parse(Extension* extension, base::string16* error) {
   scoped_ptr<WebviewInfo> info(new WebviewInfo());
 
-  const base::DictionaryValue* dict_value = NULL;
+  const base::DictionaryValue* dict_value = nullptr;
   if (!extension->manifest()->GetDictionary(keys::kWebview,
                                             &dict_value)) {
     *error = base::ASCIIToUTF16(errors::kInvalidWebview);
     return false;
   }
 
-  const base::ListValue* partition_list = NULL;
+  const base::ListValue* partition_list = nullptr;
   if (!dict_value->GetList(keys::kWebviewPartitions, &partition_list)) {
     *error = base::ASCIIToUTF16(errors::kInvalidWebviewPartitionsList);
     return false;
@@ -124,7 +124,7 @@ bool WebviewHandler::Parse(Extension* extension, base::string16* error) {
   }
 
   for (size_t i = 0; i < partition_list->GetSize(); ++i) {
-    const base::DictionaryValue* partition = NULL;
+    const base::DictionaryValue* partition = nullptr;
     if (!partition_list->GetDictionary(i, &partition)) {
       *error = ErrorUtils::FormatErrorMessageUTF16(
           errors::kInvalidWebviewPartition, base::IntToString(i));
@@ -138,7 +138,7 @@ bool WebviewHandler::Parse(Extension* extension, base::string16* error) {
       return false;
     }
 
-    const base::ListValue* url_list = NULL;
+    const base::ListValue* url_list = nullptr;
     if (!partition->GetList(keys::kWebviewAccessibleResources,
                             &url_list)) {
       *error = base::ASCIIToUTF16(