Revert of Moved logic for mapping child process FDs for ICU and V8 into child_process_launcher.cc

Revert of Moved logic for mapping child process FDs for ICU and V8 into child_process_launcher.cc (patchset #20 id:380001 of https://codereview.chromium.org/1182443003/)

Reason for revert:
Adds new static initializers in http://build.chromium.org/p/chromium/buildstatus?builder=Linux%20x64&number=4979

# icu_util.cc cc::VertexShaderQuadAA::VertexShaderQuadAA()
# icu_util.cc base::MemoryMappedFile::MemoryMappedFile()
# icu_util.cc base::i18n::(anonymous namespace)::g_icudtl_region
# icu_util.cc base::i18n::(anonymous namespace)::g_icudtl_mapped_file
# icu_util.cc operator new(unsigned long)

Original issue's description:
> Moved logic for mapping child process FDs for ICU and V8 into child_process_launcher.cc
>
> Used to be defined in each app's ContentBrowserClient, but since
> content/ is the one that receives the FDs, it makes sense that it should
> be the one to send them.
>
> This also removes ChildProcessLauncher::AppendMappedFileCommandLineSwitches
> as it is no longer needed.
>
> BUG=394502
>
> Committed: https://crrev.com/228414fc8870f88f11ada7512e88ea6999890f56
> Cr-Commit-Position: refs/heads/master@{#334702}

TBR=jochen@chromium.org,jam@chromium.org,jungshik@google.com,michaelbai@chromium.org,rmcilroy@chromium.org,thestig@chromium.org,agrieve@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=394502
Committed: https://crrev.com/39ae215990f4ff081ca2a505eb2f2adfe22cb4ab
Cr-Commit-Position: refs/heads/master@{#334719}

[Marijn Kruisselbrink, 2015-06-16 22:26:40]

Created Revert of Moved logic for mapping child process FDs for ICU and V8 into
child_process_launcher.cc

[commit-bot: I haz the power, 2015-06-16 22:28:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1187213002/1

[commit-bot: I haz the power, 2015-06-16 22:30:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-16 22:32:59]

Patchset 1 (id:??) landed as
https://crrev.com/39ae215990f4ff081ca2a505eb2f2adfe22cb4ab
Cr-Commit-Position: refs/heads/master@{#334719}