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

extensions/browser/api/capture_web_contents_function.cc

 // Copyright 2013 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/browser/api/capture_web_contents_function.h"
 
 #include "base/base64.h"
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ skipping 15 matching lines @@
 }
 
 bool CaptureWebContentsFunction::RunAsync() {
   EXTENSION_FUNCTION_VALIDATE(args_);
 
   context_id_ = extension_misc::kCurrentWindowId;
   args_->GetInteger(0, &context_id_);
 
   scoped_ptr<ImageDetails> image_details;
   if (args_->GetSize() > 1) {
-    base::Value* spec = NULL;
+    base::Value* spec = nullptr;
     EXTENSION_FUNCTION_VALIDATE(args_->Get(1, &spec) && spec);
     image_details = ImageDetails::FromValue(*spec);
   }
 
   if (!IsScreenshotEnabled())
     return false;
 
   WebContents* contents = GetWebContentsForID(context_id_);
   if (!contents)
     return false;
@@ skipping 75 matching lines @@
       reinterpret_cast<const char*>(vector_as_array(&data)), data.size());
 
   base::Base64Encode(stream_as_string, &base64_result);
   base64_result.insert(
       0, base::StringPrintf("data:%s;base64,", mime_type.c_str()));
   SetResult(new base::StringValue(base64_result));
   SendResponse(true);
 }
 
 }  // namespace extensions