Add LoadSession() to CDM_4.

Add LoadSession() to CDM_4.

- CDM_3 is replaced with CDM_4.
- Also note that OnSessionReady() will be deprecated.

BUG=338831
R=ddorwin@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=249141

[xhwang, 2014-01-29 02:06:48]

PTAL

[ddorwin, 2014-01-29 03:38:59]

lgtm % comments.

I also fixed a typo in the first bullet of the description.

https://codereview.chromium.org/130803006/diff/1/content_decryption_module.h
File content_decryption_module.h (right):

https://codereview.chromium.org/130803006/diff/1/content_decryption_module.h#...
content_decryption_module.h:957: // When the session is loaded, the
|web_session_id| must be the same as the
When called in response to LoadSession(), ...?

https://codereview.chromium.org/130803006/diff/1/content_decryption_module.h#...
content_decryption_module.h:971: // Note: "ready" event is deprecated. This is
only used for prefixed EME API's
for *the*

[xhwang, 2014-01-31 18:25:16]

https://codereview.chromium.org/130803006/diff/1/content_decryption_module.h
File content_decryption_module.h (right):

https://codereview.chromium.org/130803006/diff/1/content_decryption_module.h#...
content_decryption_module.h:957: // When the session is loaded, the
|web_session_id| must be the same as the
On 2014/01/29 03:38:59, ddorwin wrote:
> When called in response to LoadSession(), ...?

Done.

https://codereview.chromium.org/130803006/diff/1/content_decryption_module.h#...
content_decryption_module.h:971: // Note: "ready" event is deprecated. This is
only used for prefixed EME API's
On 2014/01/29 03:38:59, ddorwin wrote:
> for *the*

Done.

[xhwang, 2014-02-05 22:19:34]

Committed patchset #4 manually as r249141 (presubmit successful).