Revert of Bring up of the enhanced bookmarks cluster service. (patchset #13 id:320001...

Revert of Bring up of the enhanced bookmarks cluster service. (patchset #13 id:320001 of https://codereview.chromium.org/539173004/)

Reason for revert:
This CL added static initializers which broke the sizes bots on Mac, Linux, and Linux x64.

Before the change:
# Static initializers in src/out/Release/chrome:
# HINT: To get this list, run tools/linux/dump_static_initializers.py
# HINT: diff against the log from the last run to see what changed
# atomicops_internals_x86_gcc.cc .L.str
# atomicops_internals_x86_gcc.cc AtomicOps_Internalx86CPUFeatures
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0x65
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0xaa
# atomicops_internals_x86_gcc.cc __stack_chk_fail@plt
# atomicops_internals_x86_gcc.cc strcmp@plt
# atomicops_internals_x86_gcc.cc .L.str
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0x6b
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0xc2
# atomicops_internals_x86_gcc.cc google::protobuf::internal::AtomicOps_Internalx86CPUFeatures
# atomicops_internals_x86_gcc.cc google::protobuf::internal::AtomicOps_Internalx86CPUFeatures+0x1
# atomicops_internals_x86_gcc.cc __stack_chk_fail@plt
# atomicops_internals_x86_gcc.cc strcmp@plt
# atomicops_internals_x86_gcc.cc .L.str
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0x65
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0xaa
# atomicops_internals_x86_gcc.cc v8::base::AtomicOps_Internalx86CPUFeatures
# atomicops_internals_x86_gcc.cc __stack_chk_fail@plt
# atomicops_internals_x86_gcc.cc strcmp@plt
# debugallocation_shim.cc module_enter_exit_hook
# debugallocation_shim.cc (anonymous namespace)::large_alloc_threshold
# debugallocation_shim.cc TCMallocGuard::TCMallocGuard()
# debugallocation_shim.cc __cxa_atexit@plt [registers a dtor to run at exit]
# debugallocation_shim.cc __init_array_end+0x3538
# debugallocation_shim.cc __init_array_end+0x3540
# debugallocation_shim.cc __init_array_end+0x3548
# memory_region_map.cc libpthread_initialized
# spinlock.cc _GLOBAL__sub_I_spinlock.cc+0x12
# spinlock.cc NumCPUs()
# spinlock.cc adaptive_spin_count
# spinlock_internal.cc _GLOBAL__sub_I_spinlock_internal.cc+0x79
# spinlock_internal.cc have_futex
# spinlock_internal.cc futex_private_flag
# spinlock_internal.cc syscall@plt
# Found 34 static initializers in 7 files.

After the change:
# Static initializers in src/out/Release/chrome:
# HINT: To get this list, run tools/linux/dump_static_initializers.py
# HINT: diff against the log from the last run to see what changed
# atomicops_internals_x86_gcc.cc .L.str
# atomicops_internals_x86_gcc.cc AtomicOps_Internalx86CPUFeatures
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0x65
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0xaa
# atomicops_internals_x86_gcc.cc __stack_chk_fail@plt
# atomicops_internals_x86_gcc.cc strcmp@plt
# atomicops_internals_x86_gcc.cc .L.str
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0x6b
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0xc2
# atomicops_internals_x86_gcc.cc google::protobuf::internal::AtomicOps_Internalx86CPUFeatures
# atomicops_internals_x86_gcc.cc google::protobuf::internal::AtomicOps_Internalx86CPUFeatures+0x1
# atomicops_internals_x86_gcc.cc __stack_chk_fail@plt
# atomicops_internals_x86_gcc.cc strcmp@plt
# atomicops_internals_x86_gcc.cc .L.str
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0x65
# atomicops_internals_x86_gcc.cc _GLOBAL__sub_I_atomicops_internals_x86_gcc.cc+0xaa
# atomicops_internals_x86_gcc.cc v8::base::AtomicOps_Internalx86CPUFeatures
# atomicops_internals_x86_gcc.cc __stack_chk_fail@plt
# atomicops_internals_x86_gcc.cc strcmp@plt
# bookmark_server_cluster_service.cc .L.str
# bookmark_server_cluster_service.cc (anonymous namespace)::kClusterUrl
# bookmark_server_cluster_service.cc std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)@plt
# bookmark_server_cluster_service.cc __cxa_atexit@plt [registers a dtor to run at exit]
# bookmark_server_cluster_service.cc __init_array_end+0x3540
# bookmark_server_cluster_service.cc __init_array_end+0xe220
# debugallocation_shim.cc module_enter_exit_hook
# debugallocation_shim.cc (anonymous namespace)::large_alloc_threshold
# debugallocation_shim.cc TCMallocGuard::TCMallocGuard()
# debugallocation_shim.cc __cxa_atexit@plt [registers a dtor to run at exit]
# debugallocation_shim.cc __init_array_end+0x3538
# debugallocation_shim.cc __init_array_end+0x3540
# debugallocation_shim.cc __init_array_end+0x3548
# memory_region_map.cc libpthread_initialized
# spinlock.cc _GLOBAL__sub_I_spinlock.cc+0x12
# spinlock.cc NumCPUs()
# spinlock.cc adaptive_spin_count
# spinlock_internal.cc _GLOBAL__sub_I_spinlock_internal.cc+0x79
# spinlock_internal.cc have_futex
# spinlock_internal.cc futex_private_flag
# spinlock_internal.cc syscall@plt
# Found 40 static initializers in 8 files.

See this bot, as an example: https://build.chromium.org/p/chromium/builders/Linux%20x64/builds/71728/steps/sizes/logs/stdio

In addition to this, the CL declares a static instance of std::string which is not allowed. The S string constants also should be declared as const char kPrefServiceVersionKey[] = "version" for example.

Original issue's description:
> Bring up of the enhanced bookmarks cluster service.
>
> This service retrieves the cluster of bookmarks from the bookmark
> server.
>
> BUG=None
>
> Committed: https://crrev.com/6bb374fc58bfeeb7966b6a548b1c7b41af9c8e47
> Cr-Commit-Position: refs/heads/master@{#298582}

TBR=blundell@chromium.org,yfriedman@chromium.org,mcolbert@chromium.org,kkimlabs@chromium.org,battre@chromium.org,zea@chromium.org,sky@chromium.org,noyau@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=None

Review URL: https://codereview.chromium.org/641473002

Cr-Commit-Position: refs/heads/master@{#298629}