Remove unused parts of //mojo/common.

mojo/common/data_pipe_utils.cc

Index: mojo/common/data_pipe_utils.cc
diff --git a/mojo/common/data_pipe_utils.cc b/mojo/common/data_pipe_utils.cc
index 8540ac63473278bedd6d05978fe15fd34f23f206..bed5e858fc04e831232c15f2e15cd0cbd0b43d57 100644
--- a/mojo/common/data_pipe_utils.cc
+++ b/mojo/common/data_pipe_utils.cc
@@ -4,16 +4,9 @@
 
 #include "mojo/common/data_pipe_utils.h"
 
-#include <stddef.h>
-#include <stdint.h>
-#include <stdio.h>
 #include <utility>
 
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/files/scoped_file.h"
-#include "base/message_loop/message_loop.h"
-#include "base/task_runner_util.h"
+#include "base/bind.h"
 
 namespace mojo {
 namespace common {
@@ -58,12 +51,7 @@ size_t CopyToStringHelper(
   return num_bytes;
 }
 
-size_t CopyToFileHelper(FILE* fp, const void* buffer, uint32_t num_bytes) {
-  return fwrite(buffer, 1, num_bytes, fp);
-}
-
-} // namespace
-
+}  // namespace
 
 // TODO(hansmuller): Add a max_size parameter.
 bool BlockingCopyToString(ScopedDataPipeConsumerHandle source,
@@ -107,25 +95,5 @@ bool MOJO_COMMON_EXPORT BlockingCopyFromString(
   }
 }
 
-bool BlockingCopyToFile(ScopedDataPipeConsumerHandle source,
-                        const base::FilePath& destination) {
-  base::ScopedFILE fp(base::OpenFile(destination, "wb"));
-  if (!fp)
-    return false;
-  return BlockingCopyHelper(std::move(source),
-                            base::Bind(&CopyToFileHelper, fp.get()));
-}
-
-void CopyToFile(ScopedDataPipeConsumerHandle source,
-                const base::FilePath& destination,
-                base::TaskRunner* task_runner,
-                const base::Callback<void(bool)>& callback) {
-  base::PostTaskAndReplyWithResult(
-      task_runner,
-      FROM_HERE,
-      base::Bind(&BlockingCopyToFile, base::Passed(&source), destination),
-      callback);
-}
-
 }  // namespace common
 }  // namespace mojo