Fix return type of SetProcessDpiAwareness aka SetProcessDpiAwarenessInternal

Fix return type of SetProcessDpiAwareness aka SetProcessDpiAwarenessInternal

This function (documented as SetProcessDpiAwareness but exported as
SetProcessDpiAwarenessInternal) has a return type of HRESULT but we
declared it as returning BOOL. This triggered the following /analyze
warning:

src\chrome\app\chrome_exe_main_win.cc(104) : warning C6216:
   Compiler-inserted cast between semantically different integral
   types:  a Boolean type to HRESULT.

BUG=427616
Committed: https://crrev.com/592f8e1b305c8a67abe130210818b78d188df8b3
Cr-Commit-Position: refs/heads/master@{#302212}

[brucedawson, 2014-10-30 21:01:07]

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

[cpu_(ooo_6.6-7.5), 2014-10-31 01:39:11]

lgtm

[cpu_(ooo_6.6-7.5), 2014-10-31 01:39:14]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-10-31 01:40:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/691903002/1

[commit-bot: I haz the power, 2014-10-31 02:23:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-31 02:24:19]

Patchset 1 (id:??) landed as
https://crrev.com/592f8e1b305c8a67abe130210818b78d188df8b3
Cr-Commit-Position: refs/heads/master@{#302212}