Linux: Use poll instead of select to fix crash during startup (issue #2466)

patch/patch.cfg

@@ -373,4 +373,9 @@ patches = [
     # https://bitbucket.org/chromiumembedded/cef/issues/2456
     'name': 'content_runprocess_2456',
   },
+  {
+    # Linux: Use poll instead of select to fix crash during startup.
+    # https://bitbucket.org/chromiumembedded/cef/issues/2466
+    'name': 'linux_poll_2466',
+  },
 ]

patch/patches/linux_poll_2466.patch

@@ -0,0 +1,48 @@
+diff --git base/files/file_path_watcher_linux.cc base/files/file_path_watcher_linux.cc
+index c58d6865c27b..6ab39432259d 100644
+--- base/files/file_path_watcher_linux.cc
++++ base/files/file_path_watcher_linux.cc
+@@ -5,6 +5,7 @@
+ #include "base/files/file_path_watcher.h"
+ 
+ #include <errno.h>
++#include <poll.h>
+ #include <stddef.h>
+ #include <string.h>
+ #include <sys/inotify.h>
+@@ -13,6 +14,7 @@
+ #include <unistd.h>
+ 
+ #include <algorithm>
++#include <array>
+ #include <map>
+ #include <memory>
+ #include <set>
+@@ -221,20 +223,15 @@ LazyInstance<InotifyReader>::Leaky g_inotify_reader = LAZY_INSTANCE_INITIALIZER;
+ void InotifyReaderThreadDelegate::ThreadMain() {
+   PlatformThread::SetName("inotify_reader");
+ 
+-  // Make sure the file descriptors are good for use with select().
+-  CHECK_LE(0, inotify_fd_);
+-  CHECK_GT(FD_SETSIZE, inotify_fd_);
++  std::array<pollfd, 1> fdarray
++  { {
++      { inotify_fd_, POLLIN, 0 }
++  } };
+ 
+   while (true) {
+-    fd_set rfds;
+-    FD_ZERO(&rfds);
+-    FD_SET(inotify_fd_, &rfds);
+-
+-    // Wait until some inotify events are available.
+-    int select_result =
+-        HANDLE_EINTR(select(inotify_fd_ + 1, &rfds, nullptr, nullptr, nullptr));
+-    if (select_result < 0) {
+-      DPLOG(WARNING) << "select failed";
++    int poll_result = HANDLE_EINTR(poll(fdarray.data(), fdarray.size(), -1));
++    if (poll_result < 0) {
++      DPLOG(WARNING) << "poll failed";
+       return;
+     }
+