[inspector] Fix and refactor String16

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 ddccc09385c737e333c75975ff00644d95ae3116..09909a911bb158784ba3159e3bcc287a3445b85f 100644
--- a/src/inspector/string-16.cc
+++ b/src/inspector/string-16.cc
@@ -447,6 +447,26 @@ void String16Builder::append(const char* characters, size_t length) {
   m_buffer.insert(m_buffer.end(), characters, characters + length);
 }
 
+void String16Builder::appendNumber(int number) {
+  const int kBufferSize = 11;
+  char buffer[kBufferSize];
+  int chars = v8::base::OS::SNPrintF(buffer, kBufferSize, "%d", number);
+  DCHECK_GT(kBufferSize, chars);
+  m_buffer.insert(m_buffer.end(), buffer, buffer + chars);
+}
+
+void String16Builder::appendNumber(size_t number) {
+  const int kBufferSize = 20;
+  char buffer[kBufferSize];
+#if !defined(_WIN32) && !defined(_WIN64)
+  int chars = v8::base::OS::SNPrintF(buffer, kBufferSize, "%zu", number);
+#else
+  int chars = v8::base::OS::SNPrintF(buffer, kBufferSize, "%Iu", number);
+#endif
+  DCHECK_GT(kBufferSize, chars);
+  m_buffer.insert(m_buffer.end(), buffer, buffer + chars);
+}
+
 String16 String16Builder::toString() {
   return String16(m_buffer.data(), m_buffer.size());
 }