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

ppapi/native_client/src/trusted/plugin/plugin.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.
 
 #ifdef _MSC_VER
 // Do not warn about use of std::copy with raw pointers.
 #pragma warning(disable : 4996)
 #endif
 
 #include "native_client/src/trusted/plugin/plugin.h"
@@ skipping 659 matching lines @@
       // determine the nexe URL.
       // Sets src property to full manifest URL.
       RequestNaClManifest(manifest_url);
     }
   }
 
   PLUGIN_PRINTF(("Plugin::Init (status=%d)\n", status));
   return status;
 }
 
-
 Plugin::Plugin(PP_Instance pp_instance)
     : pp::InstancePrivate(pp_instance),
       scriptable_plugin_(NULL),
       argc_(-1),
       argn_(NULL),
       argv_(NULL),
       main_subprocess_("main subprocess", NULL, NULL),
       nacl_ready_state_(UNSENT),
       nexe_error_reported_(false),
       wrapper_factory_(NULL),
-      last_error_string_(""),
       enable_dev_interfaces_(false),
       is_installed_(false),
       init_time_(0),
       ready_time_(0),
       nexe_size_(0),
       time_of_last_progress_event_(0),
       nacl_interface_(NULL) {
   PLUGIN_PRINTF(("Plugin::Plugin (this=%p, pp_instance=%"
                  NACL_PRId32")\n", static_cast<void*>(this), pp_instance));
   callback_factory_.Initialize(this);
@@ skipping 922 matching lines @@
                                           static_cast<uint32_t>(text.size()));
   const PPB_Console* console_interface =
       static_cast<const PPB_Console*>(
           module->GetBrowserInterface(PPB_CONSOLE_INTERFACE));
   console_interface->LogWithSource(pp_instance(), PP_LOGLEVEL_LOG, prefix, str);
   var_interface->Release(prefix);
   var_interface->Release(str);
 }
 
 }  // namespace plugin