[clang] Use -Wshorten-64-to-32 to enable warnings about 64bit to 32bit truncations.

src/base/platform/platform-freebsd.cc

Index: src/base/platform/platform-freebsd.cc
diff --git a/src/base/platform/platform-freebsd.cc b/src/base/platform/platform-freebsd.cc
index 68ed70af93fa04ac226c9188bc4599a1e8671b1d..8fe908c2df97f31a139d67e60dd771e08d3bb5eb 100644
--- a/src/base/platform/platform-freebsd.cc
+++ b/src/base/platform/platform-freebsd.cc
@@ -68,54 +68,6 @@ void* OS::Allocate(const size_t requested,
 }
 
 
-class PosixMemoryMappedFile : public OS::MemoryMappedFile {
- public:
-  PosixMemoryMappedFile(FILE* file, void* memory, int size)
-    : file_(file), memory_(memory), size_(size) { }
-  virtual ~PosixMemoryMappedFile();
-  virtual void* memory() { return memory_; }
-  virtual int size() { return size_; }
- private:
-  FILE* file_;
-  void* memory_;
-  int size_;
-};
-
-
-OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) {
-  FILE* file = fopen(name, "r+");
-  if (file == NULL) return NULL;
-
-  fseek(file, 0, SEEK_END);
-  int size = ftell(file);
-
-  void* memory =
-      mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fileno(file), 0);
-  return new PosixMemoryMappedFile(file, memory, size);
-}
-
-
-OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size,
-    void* initial) {
-  FILE* file = fopen(name, "w+");
-  if (file == NULL) return NULL;
-  int result = fwrite(initial, size, 1, file);
-  if (result < 1) {
-    fclose(file);
-    return NULL;
-  }
-  void* memory =
-      mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fileno(file), 0);
-  return new PosixMemoryMappedFile(file, memory, size);
-}
-
-
-PosixMemoryMappedFile::~PosixMemoryMappedFile() {
-  if (memory_) munmap(memory_, size_);
-  fclose(file_);
-}
-
-
 static unsigned StringToLong(char* buffer) {
   return static_cast<unsigned>(strtol(buffer, NULL, 16));  // NOLINT
 }