Enumerate all display adapters to detect AMD switchable graphics.

Enumerate all display adapters to detect AMD switchable graphics.

Keying off of the driver manufacturer name doesn't work on some systems, so use SetupAPI to enumerate all installed display adapters to check if both an AMD and Intel display adapter are installed.

BUG=455046, 451420
NOPRESUBMIT=true

Committed: https://crrev.com/dd5bf63e4a1d177137a9c6c641bbc6c4782ef202
Cr-Commit-Position: refs/heads/master@{#314923}

[jbauman, 2015-02-05 22:45:40]

jbauman@chromium.org changed reviewers:
+ zmo@chromium.org

[Zhenyao Mo, 2015-02-05 23:04:28]

LGTM

Note now you scan through all devices, you need to modify the internal
GetAMDVideocardInfo() code to take advantage of that.

https://codereview.chromium.org/893993006/diff/1/gpu/config/gpu_info_collecto...
File gpu/config/gpu_info_collector_win.cc (right):

https://codereview.chromium.org/893993006/diff/1/gpu/config/gpu_info_collecto...
gpu/config/gpu_info_collector_win.cc:405: {0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1,
0x03, 0x18}};
nit: can you add a comment where the above data comes from?

[jbauman, 2015-02-05 23:16:23]

New patchsets have been uploaded after l-g-t-m from zmo@chromium.org

[jbauman, 2015-02-05 23:17:28]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2015-02-05 23:18:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/893993006/20001

[commit-bot: I haz the power, 2015-02-06 00:21:25]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-06 00:22:22]

Patchset 2 (id:??) landed as
https://crrev.com/dd5bf63e4a1d177137a9c6c641bbc6c4782ef202
Cr-Commit-Position: refs/heads/master@{#314923}

[brucedawson, 2015-02-09 18:25:40]

brucedawson@chromium.org changed reviewers:
+ brucedawson@chromium.org

[brucedawson, 2015-02-09 18:25:41]

https://codereview.chromium.org/893993006/diff/20001/gpu/config/gpu_info_coll...
File gpu/config/gpu_info_collector_win.cc (right):

https://codereview.chromium.org/893993006/diff/20001/gpu/config/gpu_info_coll...
gpu/config/gpu_info_collector_win.cc:487: uint32 vendor_id = 0, device_id = 0;
This variable declaration of device_id shadows the device_id wstring variable
that is declared at an outer scoped, and used just three lines earlier. This is
not illegal or undefined, but it is confusing. One of the variable names should
be changed to avoid this confusion.