HID device connection now shared on Linux

Remove exclusive flags so that 2 apps can communicate with same device.
This is coherent with Windows and Mac implementation.
Note that a non-chrome app (e.g. desktop app on Windows) can open same
device.

BUG=358631
TBR=rockot@chromium.org

Review URL: https://codereview.chromium.org/213743009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261019 0039d316-1c4b-4281-b951-d872f2087c98

AUTHORS

@@ -161,6 +161,7 @@ Joshua Lock <joshua.lock@intel.com>
 Joshua Roesslein <jroesslein@gmail.com>
 Josué Ratelle <jorat1346@gmail.com>
 Juhui Lee <juhui24.lee@samsung.com>
+Julien Racle <jracle@logitech.com>
 Jun Jiang <jun.a.jiang@intel.com>
 Junmin Zhu <junmin.zhu@intel.com>
 Kalyan Kondapally <kalyan.kondapally@intel.com>

device/hid/hid_connection_linux.cc

@@ -60,9 +60,7 @@ HidConnectionLinux::HidConnectionLinux(HidDeviceInfo device_info,
 
   int flags = base::File::FLAG_OPEN |
               base::File::FLAG_READ |
-              base::File::FLAG_WRITE |
-              base::File::FLAG_EXCLUSIVE_READ |
-              base::File::FLAG_EXCLUSIVE_WRITE;
+              base::File::FLAG_WRITE;
 
   base::File device_file(base::FilePath(dev_node), flags);
   if (!device_file.IsValid()) {