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

base/debug/trace_event_unittest.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 "base/debug/trace_event_unittest.h"
 
 #include <cstdlib>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 1517 matching lines @@
   ManualTestSetUp();
 
   TraceLog* trace_log = TraceLog::GetInstance();
   trace_log->SetEnabled(std::string("foo,bar"), TraceLog::RECORD_UNTIL_FULL);
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("foo"));
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("bar"));
   EXPECT_FALSE(*trace_log->GetCategoryEnabled("baz"));
   trace_log->SetEnabled(std::string("foo2"), TraceLog::RECORD_UNTIL_FULL);
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("foo2"));
   EXPECT_FALSE(*trace_log->GetCategoryEnabled("baz"));
-  trace_log->SetEnabled(std::string(""), TraceLog::RECORD_UNTIL_FULL);
+  trace_log->SetEnabled(std::string(), TraceLog::RECORD_UNTIL_FULL);
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("foo"));
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("baz"));
   trace_log->SetDisabled();
   trace_log->SetDisabled();
   trace_log->SetDisabled();
   EXPECT_FALSE(*trace_log->GetCategoryEnabled("foo"));
   EXPECT_FALSE(*trace_log->GetCategoryEnabled("baz"));
 
   trace_log->SetEnabled(std::string("-foo,-bar"), TraceLog::RECORD_UNTIL_FULL);
   EXPECT_FALSE(*trace_log->GetCategoryEnabled("foo"));
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("baz"));
   trace_log->SetEnabled(std::string("moo"), TraceLog::RECORD_UNTIL_FULL);
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("baz"));
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("moo"));
   EXPECT_TRUE(*trace_log->GetCategoryEnabled("foo"));
   trace_log->SetDisabled();
   trace_log->SetDisabled();
 }
 
 TEST_F(TraceEventTestFixture, TraceOptionsParsing) {
   ManualTestSetUp();
 
-  EXPECT_EQ(TraceLog::RECORD_UNTIL_FULL, TraceLog::TraceOptionsFromString(""));
+  EXPECT_EQ(TraceLog::RECORD_UNTIL_FULL,
+            TraceLog::TraceOptionsFromString(std::string()));
 
   EXPECT_EQ(TraceLog::RECORD_UNTIL_FULL,
             TraceLog::TraceOptionsFromString("record-until-full"));
   EXPECT_EQ(TraceLog::RECORD_CONTINUOUSLY,
             TraceLog::TraceOptionsFromString("record-continuously"));
 }
 
 TEST_F(TraceEventTestFixture, TraceSampling) {
   ManualTestSetUp();
 
@@ skipping 65 matching lines @@
                        TRACE_EVENT_SCOPE_GLOBAL);
   EXPECT_EQ(2u, collected_events_.size());
   EXPECT_EQ("event1", collected_events_[0]);
   EXPECT_EQ("event2", collected_events_[1]);
 }
 
 // TODO(dsinclair): Continuous Tracing unit test.
 
 }  // namespace debug
 }  // namespace base