Start proxying CPDFSDK_Document methods through CPDFSDK_FormFillEnvironment

Start proxying CPDFSDK_Document methods through CPDFSDK_FormFillEnvironment

This CL proxies the GetInterForm() and GetXFADocument() methods through the
FormFillEnvironment. It also updates a few classes to return the form fill
environment instead of the sdk document.

This is the first step in merging the CPDFSDK_Document into the
CPDFSDK_FormFillEnvironment.

[dsinclair, 2016-10-05 20:00:02]

dsinclair@chromium.org changed reviewers:
+ thestig@chromium.org, tsepez@chromium.org

[dsinclair, 2016-10-05 20:00:03]

PTAL.

This starts the process of merging CPDFSDK_Document into
CPDFSDK_FormFillEnvironment with the eventual goal that CPDFSDK_Document will go
away.

[dsinclair, 2016-10-05 21:15:37]

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

[commit-bot: I haz the power, 2016-10-05 21:15:45]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-05 21:21:15]

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

[commit-bot: I haz the power, 2016-10-05 21:21:16]

Dry run: Try jobs failed on following builders:
  android on master.tryserver.client.pdfium (JOB_FAILED,
https://build.chromium.org/p/tryserver.client.pdfium/builders/android/builds/...)

[dsinclair, 2016-10-06 13:41:12]

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

[commit-bot: I haz the power, 2016-10-06 13:41:20]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-06 13:52:51]

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

[commit-bot: I haz the power, 2016-10-06 13:52:52]

Dry run: This issue passed the CQ dry run.

[dsinclair, 2016-10-06 13:59:43]

On 2016/10/06 13:52:52, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

Closing this for a different approach.