Revert of [sqlite] Respect the gyp and gn component switch. (patchset #2 id:20001...

Revert of [sqlite] Respect the gyp and gn component switch. (patchset #2 id:20001 of https://codereview.chromium.org/1325513002/ )

Reason for revert:
ARRGH!  win8_chromium_gn_dgb is still broken.

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.
>
> [Relanding https://codereview.chromium.org/1322463002/ ]
>
> BUG=489444
> TBR=michaeln@chromium.org, thakis@chromium.org
>
> Committed: https://crrev.com/02ce712af589a5b722ebbf5c2fffb3e0d4849963
> Cr-Commit-Position: refs/heads/master@{#346212}

TBR=michaeln@chromium.org,thakis@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=489444

Review URL: https://codereview.chromium.org/1307363007

Cr-Commit-Position: refs/heads/master@{#346213}