Disable Warning 4702 for the PGO builds.

base/logging.cc

Index: base/logging.cc
diff --git a/base/logging.cc b/base/logging.cc
index 89102fbe9c52b04d6c54cd092d3da82dee04bf39..9fe235cc93546ba779f707522f854f2a28f4d185 100644
--- a/base/logging.cc
+++ b/base/logging.cc
@@ -537,19 +537,10 @@ LogMessage::LogMessage(const char* file, int line)
   Init(file, line);
 }
 
-#if defined(OS_WIN)
-// Disable warning C4702 ("unreachable code") until we fix crbug.com/380175.
-// TODO(scottmg|sebmarchand): Remove this pragma once the bug is fixed.
-#pragma warning(push)
-#pragma warning(disable: 4702)
-#endif
 LogMessage::LogMessage(const char* file, int line, LogSeverity severity)
     : severity_(severity), file_(file), line_(line) {
   Init(file, line);
 }
-#if defined(OS_WIN)
-#pragma warning(pop)
-#endif
 
 LogMessage::LogMessage(const char* file, int line, std::string* result)
     : severity_(LOG_FATAL), file_(file), line_(line) {