remove some calls to to-be-deprecated v8::Value::To* functions

extensions/renderer/file_system_natives.cc

 // Copyright 2014 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 "extensions/renderer/file_system_natives.h"
 
 #include <string>
 
 #include "extensions/common/constants.h"
 #include "extensions/renderer/script_context.h"
@@ skipping 54 matching lines @@
                                       blink::WebFileSystemTypeIsolated,
                                       blink::WebString::fromUTF8(name),
                                       root_url)
           .toV8Value(args.Holder(), args.GetIsolate()));
 }
 
 void FileSystemNatives::GetFileEntry(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   DCHECK(args.Length() == 5);
   DCHECK(args[0]->IsString());
-  std::string type_string = *v8::String::Utf8Value(args[0]->ToString());
+  std::string type_string = *v8::String::Utf8Value(args[0]);
   blink::WebFileSystemType type;
   bool is_valid_type = storage::GetFileSystemPublicType(type_string, &type);
   DCHECK(is_valid_type);
   if (is_valid_type == false) {
     return;
   }
 
   DCHECK(args[1]->IsString());
   DCHECK(args[2]->IsString());
   DCHECK(args[3]->IsString());
-  std::string file_system_name(*v8::String::Utf8Value(args[1]->ToString()));
-  GURL file_system_root_url(*v8::String::Utf8Value(args[2]->ToString()));
-  std::string file_path_string(*v8::String::Utf8Value(args[3]->ToString()));
+  std::string file_system_name(*v8::String::Utf8Value(args[1]));
+  GURL file_system_root_url(*v8::String::Utf8Value(args[2]));
+  std::string file_path_string(*v8::String::Utf8Value(args[3]));
   base::FilePath file_path = base::FilePath::FromUTF8Unsafe(file_path_string);
   DCHECK(storage::VirtualPath::IsAbsolute(file_path.value()));
 
   DCHECK(args[4]->IsBoolean());
   blink::WebDOMFileSystem::EntryType entry_type =
       args[4]->BooleanValue() ? blink::WebDOMFileSystem::EntryTypeDirectory
                               : blink::WebDOMFileSystem::EntryTypeFile;
 
   blink::WebLocalFrame* webframe =
       blink::WebLocalFrame::frameForContext(context()->v8_context());
   DCHECK(webframe);
   args.GetReturnValue().Set(
       blink::WebDOMFileSystem::create(
           webframe,
           type,
           blink::WebString::fromUTF8(file_system_name),
           file_system_root_url)
           .createV8Entry(blink::WebString::fromUTF8(file_path_string),
                          entry_type,
                          args.Holder(),
                          args.GetIsolate()));
 }
 
 void FileSystemNatives::CrackIsolatedFileSystemName(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   DCHECK_EQ(args.Length(), 1);
   DCHECK(args[0]->IsString());
-  std::string filesystem_name = *v8::String::Utf8Value(args[0]->ToString());
+  std::string filesystem_name = *v8::String::Utf8Value(args[0]);
   std::string filesystem_id;
   if (!storage::CrackIsolatedFileSystemName(filesystem_name, &filesystem_id))
     return;
 
   args.GetReturnValue().Set(v8::String::NewFromUtf8(args.GetIsolate(),
                                                     filesystem_id.c_str(),
                                                     v8::String::kNormalString,
                                                     filesystem_id.size()));
 }
 
@@ skipping 20 matching lines @@
   std::string message(*v8::String::Utf8Value(args[1]));
   // message is optional hence empty is fine.
 
   blink::WebDOMError dom_error = blink::WebDOMError::create(
       blink::WebString::fromUTF8(name), blink::WebString::fromUTF8(message));
   args.GetReturnValue().Set(
       dom_error.toV8Value(args.Holder(), args.GetIsolate()));
 }
 
 }  // namespace extensions