Revert of Extract webkit_unit_tests from blink_web component.

Revert of Extract webkit_unit_tests from blink_web component. (patchset #16 id:300001 of https://codereview.chromium.org/1676083002/ )

Reason for revert:
Broke compile: https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20non-Oilpan%20%28dbg%29

Original issue's description:
> Extract webkit_unit_tests from blink_web component.
>
> - Make BLINK_WEB_IMPLEMENTATION a define exported by the build system, like most
>   of the others, rather than defined in a header.
> - Create a WebExport.h header (similar to CoreExport.h, etc.) which can be used
>   to export symbols from blink_web to webkit_unit_tests.
> - Export symbols used from unit tests that aren't yet exported.
> - Remove build logic to compile unit tests into blink_web component in component
>   (shared_library) builds.
> - Handle MSVC C4275 issues: base classes are either exported or, if they are
>   clearly pure-interface or pure-data, marked to suppress the warning.
> - Adds an explicit web -> base dependency (due to platform using base, and gyp
>   not propagating this). This is similar to the equivalent in core.
> - Unexports WebRTCDataChannelHandlerClient. It's not exported from blink_web,
>   and only happened to work before because one of the modules unit tests included
>   the header, and that was previously linked into blink_web.
>
> This makes the blink_web component substantially smaller, as it no
> longer pulls in unit tests, gtest, and so on. It also unblocks
> removal of several hacks that existed to accommodate the previous
> setup.
>
> BUG=590749
>
> Committed: https://crrev.com/737c4d032a36133f1045a3e399c922a948b29f85
> Cr-Commit-Position: refs/heads/master@{#378773}

TBR=haraken@chromium.org,pdr@chromium.org,jbroman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=590749
Committed: https://crrev.com/4a75239f5b05e0b031dcb94eac91cc58a6c9e584
Cr-Commit-Position: refs/heads/master@{#378853}

[Dmitry Titov, 2016-03-02 22:04:47]

Created Revert of Extract webkit_unit_tests from blink_web component.

[commit-bot: I haz the power, 2016-03-02 22:05:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756343002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756343002/1

[commit-bot: I haz the power, 2016-03-02 22:06:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-02 22:07:47]

Description was changed from

==========
Revert of Extract webkit_unit_tests from blink_web component. (patchset #16
id:300001 of https://codereview.chromium.org/1676083002/ )

Reason for revert:
Broke compile:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20non-Oilp...

Original issue's description:
> Extract webkit_unit_tests from blink_web component.
> 
> - Make BLINK_WEB_IMPLEMENTATION a define exported by the build system, like
most
>   of the others, rather than defined in a header.
> - Create a WebExport.h header (similar to CoreExport.h, etc.) which can be
used
>   to export symbols from blink_web to webkit_unit_tests.
> - Export symbols used from unit tests that aren't yet exported.
> - Remove build logic to compile unit tests into blink_web component in
component
>   (shared_library) builds.
> - Handle MSVC C4275 issues: base classes are either exported or, if they are
>   clearly pure-interface or pure-data, marked to suppress the warning.
> - Adds an explicit web -> base dependency (due to platform using base, and gyp
>   not propagating this). This is similar to the equivalent in core.
> - Unexports WebRTCDataChannelHandlerClient. It's not exported from blink_web,
>   and only happened to work before because one of the modules unit tests
included
>   the header, and that was previously linked into blink_web.
> 
> This makes the blink_web component substantially smaller, as it no
> longer pulls in unit tests, gtest, and so on. It also unblocks
> removal of several hacks that existed to accommodate the previous
> setup.
> 
> BUG=590749
> 
> Committed: https://crrev.com/737c4d032a36133f1045a3e399c922a948b29f85
> Cr-Commit-Position: refs/heads/master@{#378773}

TBR=haraken@chromium.org,pdr@chromium.org,jbroman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=590749
==========

to

==========
Revert of Extract webkit_unit_tests from blink_web component. (patchset #16
id:300001 of https://codereview.chromium.org/1676083002/ )

Reason for revert:
Broke compile:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20non-Oilp...

Original issue's description:
> Extract webkit_unit_tests from blink_web component.
>
> - Make BLINK_WEB_IMPLEMENTATION a define exported by the build system, like
most
>   of the others, rather than defined in a header.
> - Create a WebExport.h header (similar to CoreExport.h, etc.) which can be
used
>   to export symbols from blink_web to webkit_unit_tests.
> - Export symbols used from unit tests that aren't yet exported.
> - Remove build logic to compile unit tests into blink_web component in
component
>   (shared_library) builds.
> - Handle MSVC C4275 issues: base classes are either exported or, if they are
>   clearly pure-interface or pure-data, marked to suppress the warning.
> - Adds an explicit web -> base dependency (due to platform using base, and gyp
>   not propagating this). This is similar to the equivalent in core.
> - Unexports WebRTCDataChannelHandlerClient. It's not exported from blink_web,
>   and only happened to work before because one of the modules unit tests
included
>   the header, and that was previously linked into blink_web.
>
> This makes the blink_web component substantially smaller, as it no
> longer pulls in unit tests, gtest, and so on. It also unblocks
> removal of several hacks that existed to accommodate the previous
> setup.
>
> BUG=590749
>
> Committed: https://crrev.com/737c4d032a36133f1045a3e399c922a948b29f85
> Cr-Commit-Position: refs/heads/master@{#378773}

TBR=haraken@chromium.org,pdr@chromium.org,jbroman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=590749

Committed: https://crrev.com/4a75239f5b05e0b031dcb94eac91cc58a6c9e584
Cr-Commit-Position: refs/heads/master@{#378853}
==========

[commit-bot: I haz the power, 2016-03-02 22:07:48]

Patchset 1 (id:??) landed as
https://crrev.com/4a75239f5b05e0b031dcb94eac91cc58a6c9e584
Cr-Commit-Position: refs/heads/master@{#378853}

[haraken, 2016-03-03 00:00:56]

LGTM to revert.