Move chooser_content_view from mac_sources to cocoa_sources

Move chooser_content_view from mac_sources to cocoa_sources

Fixes a MacViewsBrowser link error after r396494, starting at
http://go/macviewsbuilder/builds/10865, like

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_ConstrainedWindowButton", referenced from:
      objc-class-ref in libbrowser_ui.a(browser_ui.chooser_content_view.o)

chooser_content_view is the Cocoa UI. MacViewsBrowser gets its UI for
this from from chooser_bubble_ui_view.*

BUG=425229, 612942
TBR=juncai@chromium.org

Committed: https://crrev.com/6abb2c8a94305e390838712dd71f9c80df4ca1e7
Cr-Commit-Position: refs/heads/master@{#396771}

[tapted, 2016-05-31 02:42:17]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2016-05-31 02:42:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2025753002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2025753002/1

[commit-bot: I haz the power, 2016-05-31 02:46:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-31 02:47:37]

Description was changed from

==========
Move chooser_content_view from mac_sources to cocoa_sources

Fixes a MacViewsBrowser link error after r396494, starting at
http://go/macviewsbuilder/builds/10865, like

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_ConstrainedWindowButton", referenced from:
      objc-class-ref in libbrowser_ui.a(browser_ui.chooser_content_view.o)

chooser_content_view is the Cocoa UI. MacViewsBrowser gets its UI for
this from from chooser_bubble_ui_view.*

BUG=425229, 612942
TBR=juncai@chromium.org
==========

to

==========
Move chooser_content_view from mac_sources to cocoa_sources

Fixes a MacViewsBrowser link error after r396494, starting at
http://go/macviewsbuilder/builds/10865, like

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_ConstrainedWindowButton", referenced from:
      objc-class-ref in libbrowser_ui.a(browser_ui.chooser_content_view.o)

chooser_content_view is the Cocoa UI. MacViewsBrowser gets its UI for
this from from chooser_bubble_ui_view.*

BUG=425229, 612942
TBR=juncai@chromium.org

Committed: https://crrev.com/6abb2c8a94305e390838712dd71f9c80df4ca1e7
Cr-Commit-Position: refs/heads/master@{#396771}
==========

[commit-bot: I haz the power, 2016-05-31 02:47:38]

Patchset 1 (id:??) landed as
https://crrev.com/6abb2c8a94305e390838712dd71f9c80df4ca1e7
Cr-Commit-Position: refs/heads/master@{#396771}