Rewrite std::string("") to std::string(), Linux edition.

chrome/renderer/extensions/chrome_v8_context.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/renderer/extensions/chrome_v8_context.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_split.h"
@@ skipping 45 matching lines @@
 void ChromeV8Context::Invalidate() {
   if (v8_context_.get().IsEmpty())
     return;
   if (module_system_)
     module_system_->Invalidate();
   web_frame_ = NULL;
   v8_context_.reset();
 }
 
 std::string ChromeV8Context::GetExtensionID() {
-  return extension_ ? extension_->id() : "";
+  return extension_ ? extension_->id() : std::string();
 }
 
 // static
 v8::Handle<v8::Value> ChromeV8Context::GetOrCreateChromeHidden(
     v8::Handle<v8::Context> context) {
   v8::Local<v8::Object> global = context->Global();
   v8::Local<v8::Value> hidden = global->GetHiddenValue(
       v8::String::New(kChromeHidden));
 
   if (hidden.IsEmpty() || hidden->IsUndefined()) {
@@ skipping 103 matching lines @@
 
 std::string ChromeV8Context::GetContextTypeDescription() {
   switch (context_type_) {
     case Feature::UNSPECIFIED_CONTEXT:         return "UNSPECIFIED";
     case Feature::BLESSED_EXTENSION_CONTEXT:   return "BLESSED_EXTENSION";
     case Feature::UNBLESSED_EXTENSION_CONTEXT: return "UNBLESSED_EXTENSION";
     case Feature::CONTENT_SCRIPT_CONTEXT:      return "CONTENT_SCRIPT";
     case Feature::WEB_PAGE_CONTEXT:            return "WEB_PAGE";
   }
   NOTREACHED();
-  return "";
+  return std::string();
 }
 
 ChromeV8Context* ChromeV8Context::GetContext() {
   return this;
 }
 
 void ChromeV8Context::OnResponseReceived(const std::string& name,
                                          int request_id,
                                          bool success,
                                          const base::ListValue& response,
@@ skipping 16 matching lines @@
   // string if a validation error has occured.
   if (DCHECK_IS_ON()) {
     if (!retval.IsEmpty() && !retval->IsUndefined()) {
       std::string error = *v8::String::AsciiValue(retval);
       DCHECK(false) << error;
     }
   }
 }
 
 }  // namespace extensions