Hi Becca,

could you look into it please? For me it looks, that your CL is probably the one, which created this bug

Do you know when it can be fixed?

It's 5 days and neither problem was fixed nor patched was reverted.

There is a CL out to fix this: https://chromium-review.googlesource.com/c/chromium/src/+/1183885

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a57bb14404e53b823a6cd1a10b8366fcd42f6f34

commit a57bb14404e53b823a6cd1a10b8366fcd42f6f34
Author: Becca Hughes <beccahughes@chromium.org>
Date: Mon Aug 27 17:34:20 2018

[Audio Focus] Fix Jumbo builds

Fix an issue with duplicate AudioFocusType typedef that
breaks Jumbo builds.

BUG= 876227 

Change-Id: Ic10ecb871d8d1e63093505f63d29bf0b499e6626
Reviewed-on: https://chromium-review.googlesource.com/1183885
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586296}
[modify] https://crrev.com/a57bb14404e53b823a6cd1a10b8366fcd42f6f34/content/browser/media/media_internals_unittest.cc
[modify] https://crrev.com/a57bb14404e53b823a6cd1a10b8366fcd42f6f34/content/browser/media/session/audio_focus_delegate_default.cc
[modify] https://crrev.com/a57bb14404e53b823a6cd1a10b8366fcd42f6f34/content/browser/media/session/audio_focus_manager.cc
[modify] https://crrev.com/a57bb14404e53b823a6cd1a10b8366fcd42f6f34/content/browser/media/session/media_session_impl.cc
[modify] https://crrev.com/a57bb14404e53b823a6cd1a10b8366fcd42f6f34/content/browser/media/session/media_session_impl_browsertest.cc

Please compile tree with settings from #0 before marking this bug as fixed. I receive such errors now:

In file included from gen/content/browser/browser_jumbo_10.cc:26:
./../../content/browser/media/session/media_session_impl.cc:93:29: error: target of using declaration conflicts with declaration already in scope
using media_session::mojom::AudioFocusType;
                            ^
../../content/browser/media/session/audio_focus_delegate_android.h:15:12: note: target of using declaration
enum class AudioFocusType;
           ^
../../content/browser/media/session/audio_focus_delegate_android.h:21:12: note: conflicting declaration
enum class AudioFocusType;
           ^
In file included from gen/content/browser/browser_jumbo_10.cc:26:
./../../content/browser/media/session/media_session_impl.cc:216:33: error: incomplete type 'content::AudioFocusType' named in nested name specifier
    required_audio_focus_type = AudioFocusType::kGain;
                                ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:218:33: error: incomplete type 'content::AudioFocusType' named in nested name specifier
    required_audio_focus_type = AudioFocusType::kGainTransientMayDuck;
                                ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:225:29: error: incomplete type 'content::AudioFocusType' named in nested name specifier
      (audio_focus_type_ == AudioFocusType::kGain ||
                            ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:226:26: error: invalid operands to binary expression ('media_session::mojom::AudioFocusType' and 'content::AudioFocusType')
       audio_focus_type_ == required_audio_focus_type)) {
       ~~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:232:27: error: cannot initialize a parameter of type 'media_session::mojom::AudioFocusType' with an lvalue of type 'content::AudioFocusType'
  RequestSystemAudioFocus(required_audio_focus_type);
                          ^~~~~~~~~~~~~~~~~~~~~~~~~
../../content/browser/media/session/media_session_impl.h:214:44: note: passing argument to parameter 'audio_focus_type' here
      media_session::mojom::AudioFocusType audio_focus_type);
                                           ^
In file included from gen/content/browser/browser_jumbo_10.cc:26:
./../../content/browser/media/session/media_session_impl.cc:427:31: error: incomplete type 'content::AudioFocusType' named in nested name specifier
         audio_focus_type_ == AudioFocusType::kGain &&
                              ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:577:25: error: incomplete type 'content::AudioFocusType' named in nested name specifier
      audio_focus_type_(AudioFocusType::kGainTransientMayDuck),
                        ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:590:24: error: out-of-line definition of 'RequestSystemAudioFocus' does not match any declaration in 'content::MediaSessionImpl'
bool MediaSessionImpl::RequestSystemAudioFocus(
                       ^~~~~~~~~~~~~~~~~~~~~~~
../../content/browser/media/session/media_session_impl.h:214:7: note: type of 1st parameter of member declaration does not match definition ('media_session::mojom::AudioFocusType' vs 'content::AudioFocusType')
      media_session::mojom::AudioFocusType audio_focus_type);
      ^
In file included from gen/content/browser/browser_jumbo_10.cc:26:
./../../content/browser/media/session/media_session_impl.cc:592:46: error: cannot initialize a parameter of type 'media_session::mojom::AudioFocusType' with an lvalue of type 'content::AudioFocusType'
  bool result = delegate_->RequestAudioFocus(audio_focus_type);
                                             ^~~~~~~~~~~~~~~~
../../content/browser/media/session/audio_focus_delegate.h:31:44: note: passing argument to parameter 'audio_focus_type' here
      media_session::mojom::AudioFocusType audio_focus_type) = 0;
                                           ^
In file included from gen/content/browser/browser_jumbo_10.cc:26:
./../../content/browser/media/session/media_session_impl.cc:602:23: error: assigning to 'media_session::mojom::AudioFocusType' from incompatible type 'content::AudioFocusType'
  audio_focus_type_ = audio_focus_type;
                      ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:677:42: error: incomplete type 'content::AudioFocusType' named in nested name specifier
  bool success = RequestSystemAudioFocus(AudioFocusType::kGain);
                                         ^~~~~~~~~~~~~~~~
./../../content/browser/media/session/media_session_impl.cc:690:32: error: incomplete type 'content::AudioFocusType' named in nested name specifier
  if (!RequestSystemAudioFocus(AudioFocusType::kGain))
                               ^~~~~~~~~~~~~~~~
13 errors generated.
[8981/11932] CXX obj/content/browser/browser/browser_jumbo_13.o
ninja: build stopped: subcommand failed.

There is a pending CL to fix here: https://chromium-review.googlesource.com/c/chromium/src/+/1192118

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2f182177005dc6a2c760ff60b2f0ce9483a4b03e

commit 2f182177005dc6a2c760ff60b2f0ce9483a4b03e
Author: Becca Hughes <beccahughes@chromium.org>
Date: Tue Aug 28 17:27:00 2018

[Media Session] Fix Android Jumbo build

Fix Android jumbo build.

BUG= 876227 

Change-Id: Iabe7d634e2019ac15993ac53570b7c20e581549f
Reviewed-on: https://chromium-review.googlesource.com/1192118
Reviewed-by: John Rummell <jrummell@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586765}
[modify] https://crrev.com/2f182177005dc6a2c760ff60b2f0ce9483a4b03e/content/browser/media/session/audio_focus_delegate_android.h

Thank you