Revert of [sqlite] Respect the gyp and gn component switch.

Revert of [sqlite] Respect the gyp and gn component switch. (patchset #1 id:1 of https://codereview.chromium.org/1322463002/ )

Reason for revert:
Broken build on the Builder: Win x64 GN (dbg).
Failure example: http://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/8549

Original issue's description:
> [sqlite] Respect the gyp and gn component switch.
>
> SQLITE_API is the existing mechanism SQLite provides, and is used in
> preference to inventing a new SQLITE_EXPORT symbol (like
> sql/sql_export.h and other examples).
>
> CoreServices.framework is necessary on OSX because of the Time Machine
> patch.
>
> Remove sql/proxy.{h,cc}, which was necessary to work around SQLite
> linking statically into both component shlibs and unit test executables.
>
> BUG=489444
>
> Committed: https://crrev.com/4ec68d9ad2d3e0c74967a17946c8bf7ed4450f73
> Cr-Commit-Position: refs/heads/master@{#346151}

TBR=michaeln@chromium.org,shess@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=489444
Committed: https://crrev.com/b5feb9e34aae49aff54212f4848a8cb51b3537e0
Cr-Commit-Position: refs/heads/master@{#346179}

[sergeyv, 2015-08-28 17:46:32]

Created Revert of [sqlite] Respect the gyp and gn component switch.

[commit-bot: I haz the power, 2015-08-28 17:47:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1324523004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1324523004/1

[commit-bot: I haz the power, 2015-08-28 17:48:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-28 17:48:47]

Patchset 1 (id:??) landed as
https://crrev.com/b5feb9e34aae49aff54212f4848a8cb51b3537e0
Cr-Commit-Position: refs/heads/master@{#346179}

[Scott Hess - ex-Googler, 2015-08-28 17:51:02]

darn, I was just about to land the fix!

np, I can just slipstream it.  since the gn bots were FYI, it was ambiguous
whether to immediately revert or quickly patch.