Update Crashpad to b47bf6c250c6b825dee1c5fbad9152c2c962e828

third_party/crashpad/crashpad/util/file/file_writer.cc

Index: third_party/crashpad/crashpad/util/file/file_writer.cc
diff --git a/third_party/crashpad/crashpad/util/file/file_writer.cc b/third_party/crashpad/crashpad/util/file/file_writer.cc
index edbdb8d5bd51683ace124556471ff92583c40eeb..94f41f143c0f646945f3a9f8358bc2c510489218 100644
--- a/third_party/crashpad/crashpad/util/file/file_writer.cc
+++ b/third_party/crashpad/crashpad/util/file/file_writer.cc
@@ -73,9 +73,19 @@ bool WeakFileHandleFileWriter::WriteIoVec(std::vector<WritableIoVec>* iovecs) {
   iovec* iov = reinterpret_cast<iovec*>(&(*iovecs)[0]);
   size_t remaining_iovecs = iovecs->size();
 
+#if defined(OS_ANDROID)
+  // Android does not expose the IOV_MAX macro, but makes its value available
+  // via sysconf(). See Android 7.0.0 bionic/libc/bionic/sysconf.cpp sysconf().
+  // Bionic defines IOV_MAX at bionic/libc/include/limits.h, but does not ship
+  // this file to the NDK as <limits.h>, substituting
+  // bionic/libc/include/bits/posix_limits.h.
+  const size_t kIovMax = sysconf(_SC_IOV_MAX);
+#else
+  const size_t kIovMax = IOV_MAX;
+#endif
+
   while (size > 0) {
-    size_t writev_iovec_count =
-        std::min(remaining_iovecs, implicit_cast<size_t>(IOV_MAX));
+    size_t writev_iovec_count = std::min(remaining_iovecs, kIovMax);
     ssize_t written =
         HANDLE_EINTR(writev(file_handle_, iov, writev_iovec_count));
     if (written < 0) {