Allow compiling with enable_print_preview=false

Allow compiling with enable_print_preview=false

Earlier the warning shows an "unused variable" which is only used when
enable_print_preview is true. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723
Committed: https://crrev.com/aefb7f695c0cfb750974c8662fe7db6f6da91693
Cr-Commit-Position: refs/heads/master@{#392247}

[Wei Li, 2016-05-06 22:07:45]

Description was changed from

==========
Allow compiling without enable_print_preview

Earlier the warning shows "unused variable" which is only use while
enable_print_preview is enabled. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723
==========

to

==========
Allow compiling with enable_print_preview=false

Earlier the warning shows an "unused variable" which is only used when
enable_print_preview is true. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723
==========

[Wei Li, 2016-05-06 22:07:45]

weili@chromium.org changed reviewers:
+ jam@chromium.org

[Wei Li, 2016-05-06 22:08:36]

for review, thanks

[jam, 2016-05-06 23:50:42]

lgtm

[Wei Li, 2016-05-07 04:36:53]

The CQ bit was checked by weili@chromium.org

[commit-bot: I haz the power, 2016-05-07 04:37:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1958593003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1958593003/1

[commit-bot: I haz the power, 2016-05-07 05:46:07]

Description was changed from

==========
Allow compiling with enable_print_preview=false

Earlier the warning shows an "unused variable" which is only used when
enable_print_preview is true. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723
==========

to

==========
Allow compiling with enable_print_preview=false

Earlier the warning shows an "unused variable" which is only used when
enable_print_preview is true. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723
==========

[commit-bot: I haz the power, 2016-05-07 05:46:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-07 05:47:45]

Description was changed from

==========
Allow compiling with enable_print_preview=false

Earlier the warning shows an "unused variable" which is only used when
enable_print_preview is true. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723
==========

to

==========
Allow compiling with enable_print_preview=false

Earlier the warning shows an "unused variable" which is only used when
enable_print_preview is true. So enclose the variable definition
as well to avoid the compilation warning.

BUG=609723

Committed: https://crrev.com/aefb7f695c0cfb750974c8662fe7db6f6da91693
Cr-Commit-Position: refs/heads/master@{#392247}
==========

[commit-bot: I haz the power, 2016-05-07 05:47:46]

Patchset 1 (id:??) landed as
https://crrev.com/aefb7f695c0cfb750974c8662fe7db6f6da91693
Cr-Commit-Position: refs/heads/master@{#392247}