Revert of Extract some stuff into PackageManager

Revert of Extract some stuff into PackageManager (patchset #8 id:140001 of https://codereview.chromium.org/1352663002/ )

Reason for revert:
Compilation error in test_package_manager.h

FAILED: /b/build/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/mojo/shell/mojo_shell_unittests/test_package_manager.o.d -DV8_DEPRECATION_WARNINGS -DCLD_VERSION=2 -DENABLE_MDNS=1 -DENABLE_NOTIFICATIONS -DENABLE_PEPPER_CDMS -DENABLE_PLUGINS=1 -DENABLE_PDF=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DDONT_EMBED_BUILD_METADATA -DDCHECK_ALWAYS_ON=1 -DUSE_UDEV -DUI_COMPOSITOR_IMAGE_TRANSPORT -DUSE_ASH=1 -DUSE_AURA=1 -DUSE_PANGO=1 -DUSE_CAIRO=1 -DUSE_CLIPBOARD_AURAX11=1 -DUSE_DEFAULT_RENDER_THEME=1 -DUSE_GLIB=1 -DUSE_OPENSSL=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DENABLE_WEBRTC=1 -DENABLE_EXTENSIONS=1 -DENABLE_CONFIGURATION_POLICY -DENABLE_TASK_MANAGER=1 -DENABLE_THEMES=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_APP_LIST=1 -DENABLE_SETTINGS_APP=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DENABLE_AUTOFILL_DIALOG=1 -DENABLE_GOOGLE_NOW=1 -DENABLE_ONE_CLICK_SIGNIN -DENABLE_HIDPI=1 -DENABLE_TOPCHROME_MD=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DENABLE_BACKGROUND=1 -DENABLE_PRE_SYNC_BACKUP -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DSAFE_BROWSING_SERVICE -DCHROMIUM_BUILD -DENABLE_MEDIA_ROUTER=1 -DFIELDTRIAL_TESTING_ENABLED -DCR_CLANG_REVISION=245965-1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DMOJO_USE_SYSTEM_IMPL -DGTEST_HAS_POSIX_RE=0 -DGTEST_LANG_CXX11=0 -DGTEST_HAS_RTTI=0 -DUNIT_TEST -I../.. -Igen -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I../../third_party/mojo/src -Igen/third_party/mojo/src -I../../testing/gtest/include -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -m64 -march=x86-64 -funwind-tables -fPIC -pipe -pthread -B../../third_party/binutils/Linux_x64/Release/bin -fcolor-diagnostics -Wall -Wsign-compare -Wendif-labels -Werror -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-char-subscripts -Wno-covered-switch-default -Wno-deprecated-register -Wno-unneeded-internal-declaration -Wno-reserved-user-defined-literal -Wno-inconsistent-missing-override -Wno-shift-negative-value -O2 -fno-ident -fdata-sections -ffunction-sections -g1 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -plugin-arg-find-bad-constructs -Xclang check-templates -Xclang -add-plugin -Xclang find-bad-constructs -Wheader-hygiene -Wstring-conversion -Wthread-safety -fno-threadsafe-statics -fvisibility-inlines-hidden -std=gnu++11 -fno-rtti -fno-exceptions -c ../../mojo/shell/test_package_manager.cc -o obj/mojo/shell/mojo_shell_unittests/test_package_manager.o
In file included from ../../mojo/shell/test_package_manager.cc:5:
../../mojo/shell/test_package_manager.h:23:32: error: [chromium-style] Overriding method must be marked with 'override' or 'final'.
  virtual ~TestPackageManager();
                               ^
                                override
1 error generated.


Original issue's description:
> Extract some stuff into PackageManager:
> 
> - content handler determination from ApplicationManager::HandleFetchCallback
> - content handler registration
> - renames BaseApplicationFetcher to PackageManagerImpl.
> 
> R=yzshen@chromium.org
> BUG=
> 
> Committed: https://crrev.com/59e4ed2dd7f05972f687d628df0ba9c9cc35eb97
> Cr-Commit-Position: refs/heads/master@{#349357}

TBR=yzshen@chromium.org,ben@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

[yosin_UTC9, 2015-09-17 06:18:01]

Created Revert of Extract some stuff into PackageManager

[commit-bot: I haz the power, 2015-09-17 06:18:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1350023002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1350023002/1

[commit-bot: I haz the power, 2015-09-17 06:18:50]

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

[commit-bot: I haz the power, 2015-09-17 06:18:51]

Failed to apply patch for mojo/package_manager/DEPS:
While running git apply --index -3 -p1;
  fatal: unrecognized input

Patch:       mojo/package_manager/DEPS
Index: mojo/package_manager/DEPS
diff --git a/mojo/package_manager/DEPS b/mojo/package_manager/DEPS

[commit-bot: I haz the power, 2015-09-17 06:19:09]

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