Revert of [inspector] fix timestamp formatting with non C locales

src/inspector/string-16.cc

Index: src/inspector/string-16.cc
diff --git a/src/inspector/string-16.cc b/src/inspector/string-16.cc
index f6084602f421085127603f146f2c9618eb1b1962..e39b87c17f8f035201e9ea4b4835ea3da6c52800 100644
--- a/src/inspector/string-16.cc
+++ b/src/inspector/string-16.cc
@@ -8,10 +8,8 @@
 #include <cctype>
 #include <cstdlib>
 #include <cstring>
-#include <iomanip>
 #include <limits>
 #include <locale>
-#include <sstream>
 #include <string>
 
 #include "src/base/platform/platform.h"
@@ -383,19 +381,26 @@
 
 // static
 String16 String16::fromDouble(double number) {
-  std::ostringstream s;
-  s.imbue(std::locale("C"));
-  s << std::fixed << std::setprecision(std::numeric_limits<double>::digits10)
-    << number;
-  return String16(s.str().c_str());
+  const size_t kBufferSize = 100;
+  char buffer[kBufferSize];
+  v8::base::OS::SNPrintF(buffer, kBufferSize, "%f", number);
+  return String16(buffer);
 }
 
 // static
-String16 String16::fromDouble(double number, int precision) {
-  std::ostringstream s;
-  s.imbue(std::locale("C"));
-  s << std::fixed << std::setprecision(precision) << number;
-  return String16(s.str().c_str());
+String16 String16::fromDoublePrecision3(double number) {
+  const size_t kBufferSize = 100;
+  char buffer[kBufferSize];
+  v8::base::OS::SNPrintF(buffer, kBufferSize, "%.3g", number);
+  return String16(buffer);
+}
+
+// static
+String16 String16::fromDoublePrecision6(double number) {
+  const size_t kBufferSize = 100;
+  char buffer[kBufferSize];
+  v8::base::OS::SNPrintF(buffer, kBufferSize, "%.6g", number);
+  return String16(buffer);
 }
 
 int String16::toInteger(bool* ok) const {