The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5728f0895e82f74b307d39db57099a5197ebfeb0

commit 5728f0895e82f74b307d39db57099a5197ebfeb0
Author: pke <pke@google.com>
Date: Wed Aug 03 17:27:35 2016

Combine all suggestions factories into ContentSuggestionsServiceFactory

Remove the NTPSnippetsServiceObserver and its uses.
Change ContentSuggestionsProviders to be owned by the
ContentSuggestionsService instead of having their own lifecycle as a
KeyedService. Change RegisterProvider() and Shutdown() behavior for
the service and the providers.
Remove NTPSnippetsServiceFactory and its uses in the SnippetsBridge.
Remove OfflinePageSuggestionsProviderFactory.
Expose the NTPSnippetsService to the snippets-internals through the
ContentSuggestionsService.
Adjust unit tests.

BUG= 633139 

Review-Url: https://codereview.chromium.org/2205233002
Cr-Commit-Position: refs/heads/master@{#409556}

[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/browser/android/ntp/ntp_snippets_bridge.cc
[delete] https://crrev.com/ca02e0e5c33ca26f201fd3deaa738ee91a3351a7/chrome/browser/android/ntp/offline_page_suggestions_provider_factory.cc
[delete] https://crrev.com/ca02e0e5c33ca26f201fd3deaa738ee91a3351a7/chrome/browser/android/ntp/offline_page_suggestions_provider_factory.h
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
[delete] https://crrev.com/ca02e0e5c33ca26f201fd3deaa738ee91a3351a7/chrome/browser/ntp_snippets/ntp_snippets_service_factory.cc
[delete] https://crrev.com/ca02e0e5c33ca26f201fd3deaa738ee91a3351a7/chrome/browser/ntp_snippets/ntp_snippets_service_factory.h
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/browser/profiles/profile_manager.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/browser/ui/webui/snippets_internals_message_handler.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/browser/ui/webui/snippets_internals_message_handler.h
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/chrome/chrome_browser.gypi
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/content_suggestions_provider.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/content_suggestions_provider.h
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/content_suggestions_service.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/content_suggestions_service.h
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/content_suggestions_service_unittest.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/ntp_snippets_service.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/ntp_snippets_service.h
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/ntp_snippets_service_unittest.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/offline_pages/offline_page_suggestions_provider.cc
[modify] https://crrev.com/5728f0895e82f74b307d39db57099a5197ebfeb0/components/ntp_snippets/offline_pages/offline_page_suggestions_provider.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c9f49e317107c0a827f559f4a2da1050dd207358

commit c9f49e317107c0a827f559f4a2da1050dd207358
Author: pke <pke@google.com>
Date: Thu Aug 25 13:21:37 2016

Register all providers in IOSChromeContentSuggestionsServiceFactory

Create the articles provider (NTPSnippetsService) and the
BookmarkSuggestionsProvider in the
IOSChromeContentSuggestionsServiceFactory and register them with
the ContentSuggestionsService.

This makes the IOSChromeContentSuggestionsServiceFactory equivalent
to the ContentSuggestionsServiceFactory again (apart from the
OfflinePageSuggestionsProvider, which is Android-only).

BUG= 633139 

Review-Url: https://codereview.chromium.org/2232473002
Cr-Commit-Position: refs/heads/master@{#414415}

[modify] https://crrev.com/c9f49e317107c0a827f559f4a2da1050dd207358/ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/496451c110e32151e4ce05dc4e2e0ca83c69a3df

commit 496451c110e32151e4ce05dc4e2e0ca83c69a3df
Author: vitaliii <vitaliii@chromium.org>
Date: Thu Aug 25 18:22:38 2016

ContentSuggestionsService providers registration refactoring.

BUG= 633139 

Review-Url: https://codereview.chromium.org/2245633002
Cr-Commit-Position: refs/heads/master@{#414481}

[modify] https://crrev.com/496451c110e32151e4ce05dc4e2e0ca83c69a3df/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc