DevTools: prepare for deleting scriptPreprocessor parameter

DevTools: prepare for deleting scriptPreprocessor parameter

ScriptPreprocessor is being deprecated and will be removed soon. This CL prepares page_handler for removing scriptPreprocessor parameter from Page.reload command.

BUG=394230, 438626
Committed: https://crrev.com/0bcb07782d723c7f913cfa90f999500a447e1ac8
Cr-Commit-Position: refs/heads/master@{#314290}

[yurys, 2015-02-02 15:01:54]

yurys@chromium.org changed reviewers:
+ caseq@chromium.org, pfeldman@chromium.org

[yurys, 2015-02-03 06:11:42]

PTAL

[pfeldman, 2015-02-03 06:51:12]

lgtm.

[yurys, 2015-02-03 06:53:16]

The CQ bit was checked by yurys@chromium.org

[commit-bot: I haz the power, 2015-02-03 06:53:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/898433002/1

[commit-bot: I haz the power, 2015-02-03 08:10:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-03 08:11:20]

Patchset 1 (id:??) landed as
https://crrev.com/0bcb07782d723c7f913cfa90f999500a447e1ac8
Cr-Commit-Position: refs/heads/master@{#314290}