Merge DragClientImpl into core.

Merge DragClientImpl into core.

This adds ChromeClient methods so core can call the WebViewClient methods for
dragging removing the need for DragClient. It also merges all the code from
DragClient down into core so the drag logic lives in one places. To do this I
also had to move the WebDragOperation.h header into platform so both web/ and
core/ could depend on it.

This also exposed some dead code in web/, like tracking the last mouse position
for dragging, but nothing actually used that value.

BUG=603795
Committed: https://crrev.com/fbba129b9e1ebe8b5174fddbfe8c3b86f5337198
Cr-Commit-Position: refs/heads/master@{#387639}

[esprehn, 2016-04-15 01:23:58]

The CQ bit was checked by esprehn@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-04-15 01:24:22]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1888773003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1888773003/1

[commit-bot: I haz the power, 2016-04-15 01:34:14]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-04-15 01:34:15]

Dry run: Try jobs failed on following builders:
  mac_chromium_gn_rel on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_gn_r...)

[esprehn, 2016-04-15 01:37:55]

The CQ bit was checked by esprehn@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-04-15 01:38:25]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1888773003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1888773003/20001

[commit-bot: I haz the power, 2016-04-15 03:28:30]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-04-15 03:28:31]

Dry run: This issue passed the CQ dry run.

[esprehn, 2016-04-15 03:28:49]

Description was changed from

==========
Merge DragClientImpl into core.
==========

to

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call WebViewClient methods for
dragging
removing the need for DragClient. It also merges all the code from DragClient
down
into core so the drag logic lives in one places. To do this I also had to move
the WebDragOperation.h header into platform so both web/ and core/ could depend
on it.

BUG=603795
==========

[esprehn, 2016-04-15 03:29:37]

Description was changed from

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call WebViewClient methods for
dragging
removing the need for DragClient. It also merges all the code from DragClient
down
into core so the drag logic lives in one places. To do this I also had to move
the WebDragOperation.h header into platform so both web/ and core/ could depend
on it.

BUG=603795
==========

to

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call the WebViewClient methods for 
dragging removing the need for DragClient. It also merges all the code from 
DragClient down into core so the drag logic lives in one places. To do this I
also had to move the WebDragOperation.h header into platform so both web/ and
core/ could depend on it.

BUG=603795
==========

[esprehn, 2016-04-15 03:29:38]

esprehn@chromium.org changed reviewers:
+ dcheng@chromium.org, jam@chromium.org

[esprehn, 2016-04-15 03:30:27]

Description was changed from

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call the WebViewClient methods for 
dragging removing the need for DragClient. It also merges all the code from 
DragClient down into core so the drag logic lives in one places. To do this I
also had to move the WebDragOperation.h header into platform so both web/ and
core/ could depend on it.

BUG=603795
==========

to

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call the WebViewClient methods for 
dragging removing the need for DragClient. It also merges all the code from 
DragClient down into core so the drag logic lives in one places. To do this I
also had to move the WebDragOperation.h header into platform so both web/ and
core/ could depend on it.

This also exposed some dead code in web/, like tracking the last mouse position
for dragging, but nothing actually used that value.

BUG=603795
==========

[dcheng, 2016-04-15 07:20:35]

third_party/WebKit LGTM

https://codereview.chromium.org/1888773003/diff/20001/third_party/WebKit/Sour...
File third_party/WebKit/Source/core/page/DragController.h (right):

https://codereview.chromium.org/1888773003/diff/20001/third_party/WebKit/Sour...
third_party/WebKit/Source/core/page/DragController.h:80: DragController(Page*);
Nit: explicit

[jam, 2016-04-15 15:26:35]

lgtm

[dglazkov, 2016-04-15 15:47:47]

glorious.

[esprehn, 2016-04-15 17:48:33]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2016-04-15 17:49:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1888773003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1888773003/20001

[commit-bot: I haz the power, 2016-04-15 18:00:09]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-15 18:01:21]

Description was changed from

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call the WebViewClient methods for 
dragging removing the need for DragClient. It also merges all the code from 
DragClient down into core so the drag logic lives in one places. To do this I
also had to move the WebDragOperation.h header into platform so both web/ and
core/ could depend on it.

This also exposed some dead code in web/, like tracking the last mouse position
for dragging, but nothing actually used that value.

BUG=603795
==========

to

==========
Merge DragClientImpl into core.

This adds ChromeClient methods so core can call the WebViewClient methods for
dragging removing the need for DragClient. It also merges all the code from
DragClient down into core so the drag logic lives in one places. To do this I
also had to move the WebDragOperation.h header into platform so both web/ and
core/ could depend on it.

This also exposed some dead code in web/, like tracking the last mouse position
for dragging, but nothing actually used that value.

BUG=603795

Committed: https://crrev.com/fbba129b9e1ebe8b5174fddbfe8c3b86f5337198
Cr-Commit-Position: refs/heads/master@{#387639}
==========

[commit-bot: I haz the power, 2016-04-15 18:01:23]

Patchset 2 (id:??) landed as
https://crrev.com/fbba129b9e1ebe8b5174fddbfe8c3b86f5337198
Cr-Commit-Position: refs/heads/master@{#387639}