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

content/renderer/render_thread_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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 162 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewZoomer);
 };
 
 std::string HostToCustomHistogramSuffix(const std::string& host) {
   if (host == "mail.google.com")
     return ".gmail";
   if (host == "docs.google.com" || host == "drive.google.com")
     return ".docs";
   if (host == "plus.google.com")
     return ".plus";
-  return "";
+  return std::string();
 }
 
 void* CreateHistogram(
     const char *name, int min, int max, size_t buckets) {
   if (min <= 0)
     min = 1;
   std::string histogram_name;
   RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
   if (render_thread_impl) {  // Can be null in tests.
     histogram_name = render_thread_impl->
@@ skipping 1095 matching lines @@
 
 void RenderThreadImpl::SetFlingCurveParameters(
     const std::vector<float>& new_touchpad,
     const std::vector<float>& new_touchscreen) {
   webkit_platform_support_->SetFlingCurveParameters(new_touchpad,
                                                     new_touchscreen);
 
 }
 
 }  // namespace content