Move download extension api implementation to download/ dir.

Move download extension api implementation to download/ dir.

We're moving all the extension api implementations out of browser/extensions
into the directory with the code they are automating.

BUG=101244
R=aa@chromium.org,rdsmith@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=108660

[Aaron Boodman, 2011-11-04 05:38:12]

Thanks for doing this. See some of the previous CLs I did on the same bug for an
example of what I mean by moving the constants.

http://codereview.chromium.org/8451019/diff/2001/chrome/browser/download/down...
File chrome/browser/download/download_extension_api_constants.h (right):

http://codereview.chromium.org/8451019/diff/2001/chrome/browser/download/down...
chrome/browser/download/download_extension_api_constants.h:5: #ifndef
CHROME_BROWSER_DOWNLOAD_DOWNLOAD_EXTENSION_API_CONSTANTS_H_
Can you move these constants into download_extension_api.cc? They don't need to
be exposed publicly.

[tfarina, 2011-11-04 08:41:03]

http://codereview.chromium.org/8451019/diff/2001/chrome/browser/download/down...
File chrome/browser/download/download_extension_api_constants.h (right):

http://codereview.chromium.org/8451019/diff/2001/chrome/browser/download/down...
chrome/browser/download/download_extension_api_constants.h:5: #ifndef
CHROME_BROWSER_DOWNLOAD_DOWNLOAD_EXTENSION_API_CONSTANTS_H_
On 2011/11/04 05:38:12, Aaron Boodman wrote:
> Can you move these constants into download_extension_api.cc? They don't need
to
> be exposed publicly.

Done.

[Randy Smith (Not in Mondays), 2011-11-04 13:32:32]

Ben Hayden's the right person to review this for the downloads team; please wait
for his review.

[benjhayden, 2011-11-04 13:45:24]

LGTM
Thank you for doing this! I was just about to split it out of my 7825035 CL, but
merging it will be easier.

[Aaron Boodman, 2011-11-04 15:27:14]

lgtm