base::CopyFile can copy *from* Android's content scheme.

base/files/file_util_unittest.cc

Index: base/files/file_util_unittest.cc
diff --git a/base/files/file_util_unittest.cc b/base/files/file_util_unittest.cc
index 08c9587cc0655895e4604cc7e85be88f25215d05..46375ccdeb5053956364ca85826044f521fea096 100644
--- a/base/files/file_util_unittest.cc
+++ b/base/files/file_util_unittest.cc
@@ -1471,12 +1471,12 @@ TEST_F(FileUtilTest, CopyFile) {
   FilePath dest_file = dir_name_from.Append(FILE_PATH_LITERAL("DestFile.txt"));
   ASSERT_TRUE(CopyFile(file_name_from, dest_file));
 
-  // Copy the file to another location using '..' in the path.
+  // Try to copy the file to another location using '..' in the path.
   FilePath dest_file2(dir_name_from);
   dest_file2 = dest_file2.AppendASCII("..");
   dest_file2 = dest_file2.AppendASCII("DestFile.txt");
   ASSERT_FALSE(CopyFile(file_name_from, dest_file2));
-  ASSERT_TRUE(internal::CopyFileUnsafe(file_name_from, dest_file2));
+  ASSERT_FALSE(internal::CopyFileUnsafe(file_name_from, dest_file2));

[rvargas (doing something else), 2014/11/11 23:40:49]

Aha!. So the code was already there :)

What we need is a dedicated test for internal::CopyFileUnsafe that passes on all
platforms (if we keep the function), or better yet, remove the function as it
appears to have no users.

 
   FilePath dest_file2_test(dir_name_from);
   dest_file2_test = dest_file2_test.DirName();
@@ -1487,8 +1487,8 @@ TEST_F(FileUtilTest, CopyFile) {
   EXPECT_TRUE(PathExists(dest_file));
   const std::wstring read_contents = ReadTextFile(dest_file);
   EXPECT_EQ(file_contents, read_contents);
-  EXPECT_TRUE(PathExists(dest_file2_test));
-  EXPECT_TRUE(PathExists(dest_file2));
+  EXPECT_FALSE(PathExists(dest_file2_test));
+  EXPECT_FALSE(PathExists(dest_file2));
 }
 
 TEST_F(FileUtilTest, CopyFileACL) {