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

content/browser/gpu/gpu_data_manager_impl.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/browser/gpu/gpu_data_manager_impl.h"
 
 #if defined(OS_MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #endif  // OS_MACOSX
 
@@ skipping 99 matching lines @@
 GpuDataManagerImpl* GpuDataManagerImpl::GetInstance() {
   return Singleton<GpuDataManagerImpl>::get();
 }
 
 void GpuDataManagerImpl::InitializeForTesting(
     const std::string& gpu_blacklist_json,
     const GPUInfo& gpu_info) {
   // This function is for testing only, so disable histograms.
   update_histograms_ = false;
 
-  InitializeImpl(gpu_blacklist_json, "", "", gpu_info);
+  InitializeImpl(gpu_blacklist_json, std::string(), std::string(), gpu_info);
 }
 
 bool GpuDataManagerImpl::IsFeatureBlacklisted(int feature) const {
   if (software_rendering_) {
     // Skia's software rendering is probably more efficient than going through
     // software emulation of the GPU, so use that.
     if (feature == GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS)
       return true;
     return false;
   }
@@ skipping 212 matching lines @@
     gpu_info_collector::MergeGPUInfo(&gpu_info_, gpu_info);
     complete_gpu_info_already_requested_ =
         complete_gpu_info_already_requested_ || gpu_info_.finalized;
     my_gpu_info = gpu_info_;
   }
 
   GetContentClient()->SetGpuInfo(my_gpu_info);
 
   if (gpu_blacklist_.get()) {
     std::set<int> features = gpu_blacklist_->MakeDecision(
-        GpuControlList::kOsAny, "", my_gpu_info);
+        GpuControlList::kOsAny, std::string(), my_gpu_info);
     if (update_histograms_)
       UpdateStats(gpu_blacklist_.get(), features);
 
     UpdateBlacklistedFeatures(features);
   }
   if (gpu_switching_list_.get()) {
     std::set<int> option = gpu_switching_list_->MakeDecision(
-        GpuControlList::kOsAny, "", my_gpu_info);
+        GpuControlList::kOsAny, std::string(), my_gpu_info);
     if (option.size() == 1) {
       // Blacklist decision should not overwrite commandline switch from users.
       CommandLine* command_line = CommandLine::ForCurrentProcess();
       if (!command_line->HasSwitch(switches::kGpuSwitching))
         gpu_switching_ = static_cast<GpuSwitchingOption>(*(option.begin()));
     }
   }
   if (gpu_driver_bug_list_.get())
     gpu_driver_bugs_ = gpu_driver_bug_list_->MakeDecision(
-        GpuControlList::kOsAny, "", my_gpu_info);
+        GpuControlList::kOsAny, std::string(), my_gpu_info);
 
   // We have to update GpuFeatureType before notify all the observers.
   NotifyGpuInfoUpdate();
 }
 
 void GpuDataManagerImpl::UpdateVideoMemoryUsageStats(
     const GPUVideoMemoryUsageStats& video_memory_usage_stats) {
   observer_list_->Notify(&GpuDataManagerObserver::OnVideoMemoryUsageStatsUpdate,
                          video_memory_usage_stats);
 }
@@ skipping 510 matching lines @@
 
 void GpuDataManagerImpl::Notify3DAPIBlocked(const GURL& url,
                                             int render_process_id,
                                             int render_view_id,
                                             ThreeDAPIType requester) {
   observer_list_->Notify(&GpuDataManagerObserver::DidBlock3DAPIs,
                          url, render_process_id, render_view_id, requester);
 }
 
 }  // namespace content