Revert of Restrict use of hardware-secure codecs based on the RendererPreference.

Revert of Restrict use of hardware-secure codecs based on the RendererPreference. (patchset #11 id:210001 of https://codereview.chromium.org/1124863005/)

Reason for revert:
Compile failure in KeySystemConfigSelectorTest::SelectConfig().

../../media/blink/key_system_config_selector_unittest.cc:177:57: error: too few arguments to function call, expected 6, have 5

http://build.chromium.org/p/chromium.linux/builders/Linux%20GN%20Clobber/builds/113

Original issue's description:
> Restrict use of hardware-secure codecs based on the RendererPreference.
>
> This passes the value of |use_video_overlay_for_embedded_encrypted_video| from RendererPreferences to requestMediaKeySystemAccess() so that it can correctly block either non-hardware-secure codecs or hardware-secure codecs.
>
> BUG=467779
>
> Committed: https://crrev.com/491fea8c41977b1557a79cf2f53d4b60ecd159d9
> Cr-Commit-Position: refs/heads/master@{#329296}

TBR=xhwang@chromium.org,ddorwin@chromium.org,nasko@chromium.org,sky@chromium.org,sandersd@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=467779
Committed: https://crrev.com/ca9edf06f6a2fba3836ba888c3e008fbaf1ab232
Cr-Commit-Position: refs/heads/master@{#329307}

[mdempsky, 2015-05-12 01:15:57]

Created Revert of Restrict use of hardware-secure codecs based on the
RendererPreference.

[commit-bot: I haz the power, 2015-05-12 01:19:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1137993004/1

[commit-bot: I haz the power, 2015-05-12 01:21:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-12 01:22:32]

Patchset 1 (id:??) landed as
https://crrev.com/ca9edf06f6a2fba3836ba888c3e008fbaf1ab232
Cr-Commit-Position: refs/heads/master@{#329307}