Move WebCore::InspectorBackendDispatcherImpl::dispatch(WTF::String const&)::handlers to .data.rel.ro section

This data can now be shared between different library instances on
Android, thus saving RAM.

The size of WebCore::InspectorBackendDispatcherImpl::dispatch(WTF::String const&)::handlers is 1872 bytes.

BUG=249746

Review URL: https://codereview.chromium.org/121883004

git-svn-id: svn://svn.chromium.org/blink/trunk@164595 bbb929c8-8fbe-4397-9dbb-9b2b20218538