This error was repeated on me a few times with the same situation:
I watched a movie on the site nttp: //kinogo.net in Google Chrome and Xorg freezes after about 30 minutes of viewing
My notebook: msi gs 70 2pc (core I7, nvidia gtx 860) 
Ubuntu 14.10 Amd64

syslog:
Mar 12 05:23:54 xxx kernel: [58769.840122] ------------[ cut here ]------------
Mar 12 05:23:54 xxx kernel: [58769.840188] WARNING: CPU: 0 PID: 1472 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324 intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]()
Mar 12 05:23:54 xxx kernel: [58769.840191] Modules linked in: alx mdio ctr ccm bbswitch(OE) bnep rfcomm dm_crypt nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic mxm_wmi msi_wmi sparse_keymap snd_hda_intel snd_hda_controller intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 snd_hda_codec kvm snd_hwdep snd_pcm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_seq_midi snd_seq_midi_event aesni_intel snd_rawmidi ath9k aes_x86_64 lrw gf128mul glue_helper ath9k_common ablk_helper cryptd ath9k_hw snd_seq joydev ath serio_raw ath3k mac80211 btusb bluetooth 6lowpan_iphc snd_seq_device snd_timer cfg80211 snd mei_me lpc_ich mei shpchp soundcore wmi mac_hid parport_pc ppdev lp parport hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper psmouse ahci drm libahci video [last unloaded: mdio]
Mar 12 05:23:54 xxx kernel: [58769.840268] CPU: 0 PID: 1472 Comm: Xorg Tainted: P           OE 3.16.0-31-generic #41-Ubuntu
Mar 12 05:23:54 xxx kernel: [58769.840272] Hardware name: Micro-Star International Co., Ltd. GS70 2PC Stealth/MS-1772, BIOS E1772IMS.10C 10/21/2014
Mar 12 05:23:54 xxx kernel: [58769.840274]  0000000000000009 ffff880221677c18 ffffffff82782d0b 0000000000000000
Mar 12 05:23:54 xxx kernel: [58769.840280]  ffff880221677c50 ffffffff8206ff2d 0000000000000000 ffff880223883000
Mar 12 05:23:54 xxx kernel: [58769.840285]  ffff88021fd98210 ffff8802238eb800 ffff8802238eb800 ffff880221677c60
Mar 12 05:23:54 xxx kernel: [58769.840290] Call Trace:
Mar 12 05:23:54 xxx kernel: [58769.840303]  [<ffffffff82782d0b>] dump_stack+0x45/0x56
Mar 12 05:23:54 xxx kernel: [58769.840312]  [<ffffffff8206ff2d>] warn_slowpath_common+0x7d/0xa0
Mar 12 05:23:54 xxx kernel: [58769.840318]  [<ffffffff8207000a>] warn_slowpath_null+0x1a/0x20
Mar 12 05:23:54 xxx kernel: [58769.840350]  [<ffffffffc03b813c>] intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]
Mar 12 05:23:54 xxx kernel: [58769.840360]  [<ffffffff820b97b0>] ? prepare_to_wait_event+0x100/0x100
Mar 12 05:23:54 xxx kernel: [58769.840391]  [<ffffffffc03bac03>] intel_crtc_disable_planes+0x33/0x1c0 [i915]
Mar 12 05:23:54 xxx kernel: [58769.840396]  [<ffffffff82787e9b>] ? __ww_mutex_lock+0x1b/0xb0
Mar 12 05:23:54 xxx kernel: [58769.840426]  [<ffffffffc03bbb47>] haswell_crtc_disable+0x57/0x2d0 [i915]
Mar 12 05:23:54 xxx kernel: [58769.840431]  [<ffffffff82788af2>] ? mutex_lock+0x12/0x30
Mar 12 05:23:54 xxx kernel: [58769.840462]  [<ffffffffc03bc577>] intel_crtc_update_dpms+0x67/0xa0 [i915]
Mar 12 05:23:54 xxx kernel: [58769.840494]  [<ffffffffc03c0c09>] intel_connector_dpms+0x59/0x70 [i915]
Mar 12 05:23:54 xxx kernel: [58769.840524]  [<ffffffffc02e2e19>] drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
Mar 12 05:23:54 xxx kernel: [58769.840547]  [<ffffffffc02e2e50>] drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
Mar 12 05:23:54 xxx kernel: [58769.840563]  [<ffffffffc02d1a4f>] drm_ioctl+0x1df/0x680 [drm]
Mar 12 05:23:54 xxx kernel: [58769.840572]  [<ffffffff8241770e>] ? brightness_store+0xce/0x100
Mar 12 05:23:54 xxx kernel: [58769.840578]  [<ffffffff822205ac>] ? fsnotify+0x27c/0x350
Mar 12 05:23:54 xxx kernel: [58769.840584]  [<ffffffff821f5658>] do_vfs_ioctl+0x2c8/0x4a0
Mar 12 05:23:54 xxx kernel: [58769.840589]  [<ffffffff821e3b51>] ? __sb_end_write+0x31/0x60
Mar 12 05:23:54 xxx kernel: [58769.840594]  [<ffffffff821f58b1>] SyS_ioctl+0x81/0xa0
Mar 12 05:23:54 xxx kernel: [58769.840600]  [<ffffffff8278ad2d>] system_call_fastpath+0x1a/0x1f
Mar 12 05:23:54 xxx kernel: [58769.840603] ---[ end trace 395e59291d098358 ]---
Mar 12 05:24:06 xxx kernel: [58781.198023] Watchdog[14435]: segfault at 0 ip 00007ff20080e476 sp 00007ff1f08b66a0 error 6 in chrome[7ff1fc920000+5154000]
Mar 12 05:24:16 xxx kernel: [58791.474004] Watchdog[23452]: segfault at 0 ip 00007f7a0fe44476 sp 00007f79ffeec6a0 error 6 in chrome[7f7a0bf56000+5154000]

dmesg in attachment
What other information to provide?