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

content/gpu/gpu_info_collector.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 "content/gpu/gpu_info_collector.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 35 matching lines @@
   }
 
   return context;
 }
 
 std::string GetGLString(unsigned int pname) {
   const char* gl_string =
       reinterpret_cast<const char*>(glGetString(pname));
   if (gl_string)
     return std::string(gl_string);
-  return "";
+  return std::string();
 }
 
 // Return a version string in the format of "major.minor".
 std::string GetVersionFromString(const std::string& version_string) {
   size_t begin = version_string.find_first_of("0123456789");
   if (begin != std::string::npos) {
     size_t end = version_string.find_first_not_of("01234567890.", begin);
     std::string sub_string;
     if (end != std::string::npos)
       sub_string = version_string.substr(begin, end - begin);
     else
       sub_string = version_string.substr(begin);
     std::vector<std::string> pieces;
     base::SplitString(sub_string, '.', &pieces);
     if (pieces.size() >= 2)
       return pieces[0] + "." + pieces[1];
   }
-  return "";
+  return std::string();
 }
 
 }  // namespace anonymous
 
 namespace gpu_info_collector {
 
 bool CollectGraphicsInfoGL(content::GPUInfo* gpu_info) {
   if (!gfx::GLSurface::InitializeOneOff()) {
     LOG(ERROR) << "gfx::GLSurface::InitializeOneOff() failed";
     return false;
@@ skipping 44 matching lines @@
 
   basic_gpu_info->can_lose_context = context_gpu_info.can_lose_context;
   basic_gpu_info->sandboxed = context_gpu_info.sandboxed;
   basic_gpu_info->gpu_accessible = context_gpu_info.gpu_accessible;
   basic_gpu_info->finalized = context_gpu_info.finalized;
   basic_gpu_info->initialization_time = context_gpu_info.initialization_time;
 }
 
 }  // namespace gpu_info_collector