Roll forward to cl/333580336

Signed-off-by: Josh Nohle <nohle@google.com>

cpp/platform_v2/impl/ios/log_message.h

@@ -0,0 +1,28 @@
+#ifndef PLATFORM_V2_IMPL_IOS_LOG_MESSAGE_H_
+#define PLATFORM_V2_IMPL_IOS_LOG_MESSAGE_H_
+
+#include "base/logging.h"
+#include "platform_v2/api/log_message.h"
+
+namespace location {
+namespace nearby {
+namespace ios {
+
+class LogMessage : public api::LogMessage {
+ public:
+  LogMessage(const char* file, int line, Severity severity);
+  ~LogMessage() override;
+
+  void Print(const char* format, ...) override;
+
+  std::ostream& Stream() override;
+
+ private:
+  absl::LogStreamer log_streamer_;
+};
+
+}  // namespace ios
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_V2_IMPL_IOS_LOG_MESSAGE_H_