[AiS] Fix ownership issue for image service observers

[AiS] Fix ownership issue for image service observers

The Java bridge erroneously did a "delete this" on the observer when
request completion was signaled. That is not necessary, since the
BitmapFetcherService takes ownership of all observers.

As a result of this, there is also no need for the observer to signal
request completion. If clients are interested in taking action on
completion, they can do so in the Observer's destructor.

TBR=sky@chromium.org, tedchoc@chromium.org
BUG=380916
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=278869

[groby-ooo-7-16, 2014-06-20 01:05:50]

Ted, Sky: Just a heads-up. Small bug fix that's TBR'd, but waiting for trybots.

[Ted C, 2014-06-20 01:12:12]

lgtm

[sky, 2014-06-20 01:38:54]

LGTM

[groby-ooo-7-16, 2014-06-20 01:48:45]

The CQ bit was checked by groby@chromium.org

[commit-bot: I haz the power, 2014-06-20 01:52:03]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/groby@chromium.org/341083008/20001

[commit-bot: I haz the power, 2014-06-20 12:58:26]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)
  ios_dbg_simulator on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_dbg_simulator/bui...)
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_gn_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_gn_rel...)
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)
  mac_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_compile_...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)
  win_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_compile_...)
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-06-20 14:01:36]

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

[commit-bot: I haz the power, 2014-06-20 14:01:37]

Try jobs failed on following builders:
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[groby-ooo-7-16, 2014-06-20 18:04:44]

Heads up - fixed the broken test.

[groby-ooo-7-16, 2014-06-20 18:05:33]

The CQ bit was checked by groby@chromium.org

[commit-bot: I haz the power, 2014-06-20 18:06:39]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/groby@chromium.org/341083008/60001

[commit-bot: I haz the power, 2014-06-20 22:27:40]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/8...)

[groby-ooo-7-16, 2014-06-20 22:29:15]

Marked as NOTRY since AOSP build keeps exploding on missing JSON for steps.

[groby-ooo-7-16, 2014-06-20 22:29:20]

The CQ bit was unchecked by groby@chromium.org

[groby-ooo-7-16, 2014-06-20 22:29:27]

The CQ bit was checked by groby@chromium.org

[commit-bot: I haz the power, 2014-06-20 22:30:44]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/groby@chromium.org/341083008/60001

[commit-bot: I haz the power, 2014-06-20 22:42:50]

Commit queue failed due to new patchset.

[groby-ooo-7-16, 2014-06-20 22:46:35]

The CQ bit was unchecked by groby@chromium.org

[groby-ooo-7-16, 2014-06-20 22:46:36]

The CQ bit was checked by groby@chromium.org

[commit-bot: I haz the power, 2014-06-20 22:47:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/groby@chromium.org/341083008/80001

[commit-bot: I haz the power, 2014-06-20 23:51:46]

Change committed as 278869