ppapi: Cleanup class/struct forward declarations

ppapi: Cleanup class/struct forward declarations

Remove useless class and struct forward declarations, and add
missing ones in ppapi header files.

BUG=662195
Committed: https://crrev.com/3fc70420614cce741583c6dcb3b4056e5aec365d
Cr-Commit-Position: refs/heads/master@{#436167}

[jbriance, 2016-12-02 17:36:02]

jbriance@cisco.com changed reviewers:
+ bbudge@chromium.org, raymes@chromium.org

[bbudge, 2016-12-02 18:20:01]

Nice, thank you. lgtm

[jbriance, 2016-12-02 18:55:50]

The CQ bit was checked by jbriance@cisco.com to run a CQ dry run

[commit-bot: I haz the power, 2016-12-02 18:56:25]

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, 2016-12-02 19:10:15]

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

[commit-bot: I haz the power, 2016-12-02 19:10:16]

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

[jbriance, 2016-12-03 09:09:43]

The CQ bit was checked by jbriance@cisco.com to run a CQ dry run

[commit-bot: I haz the power, 2016-12-03 09:09:55]

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, 2016-12-03 10:51:48]

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

[commit-bot: I haz the power, 2016-12-03 10:51:49]

Dry run: This issue passed the CQ dry run.

[jbriance, 2016-12-03 10:56:35]

The CQ bit was checked by jbriance@cisco.com

[jbriance, 2016-12-03 10:56:36]

The patchset sent to the CQ was uploaded after l-g-t-m from bbudge@chromium.org
Link to the patchset: https://codereview.chromium.org/2539033005/#ps20001
(title: "Add missing forward declaration in content/renderer/pepper")

[commit-bot: I haz the power, 2016-12-03 10:56:42]

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, 2016-12-03 20:49:25]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1480762595923140,
"parent_rev": "318c5f187a435df3f05f1c81db5a2b586dc7286f", "commit_rev":
"27c6ca6ba4f62618bb58728d2ec21eeb35c1ddb8"}

[commit-bot: I haz the power, 2016-12-03 20:50:15]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-12-03 20:53:43]

Description was changed from

==========
ppapi: Cleanup class/struct forward declarations

Remove useless class and struct forward declarations, and add
missing ones in ppapi header files.

BUG=662195
==========

to

==========
ppapi: Cleanup class/struct forward declarations

Remove useless class and struct forward declarations, and add
missing ones in ppapi header files.

BUG=662195

Committed: https://crrev.com/3fc70420614cce741583c6dcb3b4056e5aec365d
Cr-Commit-Position: refs/heads/master@{#436167}
==========

[commit-bot: I haz the power, 2016-12-03 20:53:44]

Patchset 2 (id:??) landed as
https://crrev.com/3fc70420614cce741583c6dcb3b4056e5aec365d
Cr-Commit-Position: refs/heads/master@{#436167}