Breakdown nonprofiled memory regions (f.k.a. 'unknown'), and add new policy files.

tools/deep_memory_profiler/dmpolicy

-heap profile policy: POLICY_DEEP_2
-#
-# This file contains a classification policy for dmprof.py.
-#
-# Each line indicates a group to be classified and conditions for classifying
-# in the following format.
-#   Format: <group-name> <region-type> <pattern>
-#
-# <group-name> is a name for the group to be classified.  Same names can appear
-# in the same policy file multiple times.  <region-type> represents a type of
-# the memory region.  It's one of {malloc, mmap, default, optional}.  <pattern>
-# is a Python-style regular expression to match with calling stack frames.
-#
-# For each memory chunks allocated by malloc, its calling stack frame of malloc
-# is compared with these classification policies whose <region-type> is 'malloc'
-# from the top.  If <pattern> of the policy matches the frame, the memory chunk
-# is classified into <group-name>.  The same way for 'mmap'.
-#
-# Policy lines whose <region-type>s are 'optional' and 'default' are used by
-# dmprof.py internally.  'optional' policies can be disabled by removing or
-# commenting-out.
-#
-second                          optional        optional
-minute                          optional        optional
-unknown                         optional        optional
-total-exclude-profiler          optional        optional
-#total                          optional        optional
-#anonymous                      optional        optional
-#filemapped                     optional        optional
-#other                          optional        optional
-#total-vm                       optional        optional
-#anonymous-vm                   optional        optional
-#filemapped-vm                  optional        optional
-#other-vm                       optional        optional
-#vm-profiler                    optional        optional
-#vm-total                       optional        optional
-no-bucket                       default default
-mmap-profiler                   mmap    .*(ProfilerMalloc|MemoryRegionMap::).*
-mmap-tcmalloc                   mmap    .*(DoAllocWithArena|SbrkSysAllocator::Alloc|MmapSysAllocator::Alloc|LowLevelAlloc::Alloc|LowLevelAlloc::AllocWithArena).*
-mmap-v8-heap-new                mmap    .*v8::.*::ReserveInitialChunk.*
-mmap-v8-heap-coderange          mmap    .*v8::.*::CodeRange::Setup.*
-mmap-v8-heap-old-evacuate       mmap    .*v8::.*::OldSpace::.* v8::internal::ScavengingVisitor::EvacuateObject.*
-mmap-v8-heap-old                mmap    .*v8::.*::OldSpace::.*
-mmap-v8-heap-largeobj           mmap    .*v8::.*::LargeObjectChunk::New.*
-mmap-v8-heap-other              mmap    .*VirtualMemory.*
-mmap-v8-heap-other              mmap    .*v8::internal::OS::Allocate.*
-mmap-v8-nonheap                 mmap    .*v8::.*
-#mmap-webkit                    mmap    .*(WTF::|WebCore::|WebKit::).*
-#mmap-sqlite                    mmap    .*sqlite3MemMalloc.*
-#mmap-pl-arena                  mmap    .*PL_ArenaAllocate.*
-#mmap-sk                        mmap    .*sk_malloc_flags.*
-mmap-no-policy                  mmap    .*
-mmap-total-log                  default default
-mmap-no-log                     default default
-mmap-total-record               default default
-#mmap-total-record-vm           default default
-tc-webcore-attreventlistener    malloc  .*WebCore::createAttributeEventListener.*
-tc-webcore-v8lazyeventlistener  malloc  .*WebCore::V8LazyEventListener::create.*
-tc-webcore-v8eventlistener      malloc  .*WebCore::V8EventListener::create.*
-tc-v8-heap                      malloc  .*v8::.*::ReserveInitialChunk.*
-tc-v8-heap                      malloc  .*v8::.*::CodeRange::Setup.*
-tc-v8-heap                      malloc  .*v8::.*::OldSpace::.*
-tc-v8-heap                      malloc  .*v8::.*::LargeObjectChunk::New.*
-tc-v8-heap                      malloc  .*VirtualMemory.*
-tc-v8-heap                      malloc  .*v8::internal::OS::Allocate.*
-tc-webcore-event                malloc  .*WebCore::Event::create .*
-tc-webcore-document             malloc  .*WebCore::Document::create .*
-tc-webcore-node                 malloc  .*WebCore::Node::create .*
-tc-webcore-eventlistener        malloc  .*WebCore::EventListener::create .*
-tc-wtf-stringimpl               malloc  .*WTF::StringImpl::create .*
-tc-webcore-cachedresource       malloc  .*WebCore::CachedResource::load .*
-tc-webcore-domwindow            malloc  .*WebCore::DOMWindow::create .*
-tc-webkit-shrinkToFit           malloc  .*WTF::StringImpl::createUninitialized WTF::StringBuilder::shrinkToFit WebCore::XMLHttpRequest::didFinishLoading.*
-tc-webkit-StringImpl12          malloc  .*WTF::StringImpl::createUninitialized WTF::StringBuilder::shrinkToFit WTF::StringBuilder::toString.*
-tc-webkit-KURLgoogle-v8         malloc  .*WTF::StringImpl::createUninitialized WTF::StringImpl::create String WebCore::KURLGooglePrivate::string WebCore::KURL::string WTF::String WebCore::V8XMLHttpRequest::sendCallback.*
-tc-webkit-KURLgoogle            malloc  .*WTF::StringImpl::createUninitialized WTF::StringImpl::create String WebCore::KURLGooglePrivate::string.*
-tc-webkit-StringAMTB            malloc  .*WTF::StringImpl::createUninitialized WTF::StringImpl::create String WebCore::AtomicMarkupTokenBase::.*
-tc-webkit-StringImpl2           malloc  .*WTF::StringImpl::createUninitialized WTF::StringImpl::create.*
-tc-webkit-StringImpl3           malloc  .*WTF::StringImpl::createUninitialized WTF::String::append.*
-tc-webkit-StringImpl4           malloc  .*WTF::StringImpl::createUninitialized WTF::String::fromUTF8.*
-tc-webkit-StringImpl5           malloc  .*WTF::StringImpl::createUninitialized WTF::StringBuilder::allocateBuffer.*
-tc-webkit-StringImpl6           malloc  .*WTF::StringImpl::createUninitialized WTF::String::createUninitialized.*
-tc-webkit-StringImpl7           malloc  .*WTF::StringImpl::createUninitialized WTF::StringImpl::upper.*
-tc-webkit-StringImpl8           malloc  .*WTF::StringImpl::createUninitialized WTF::StringImpl::replace.*
-tc-webkit-StringImpl            malloc  .*WTF::StringImpl::createUninitialized.*
-tc-webkit-htmlElement           malloc  .*WebCore::HTMLElementFactory::createHTMLElement.*
-tc-webkit-htmlAttribute         malloc  .*WebCore::Element::setAttributeMap.*
-tc-webkit-atomicHTMLToken       malloc  .*AtomicHTMLToken.*
-tc-webkit-htmltree              malloc  .*WebCore::HTMLTreeBuilder::constructTreeFromToken.*
-tc-webkit-hashtable             malloc  .*WTF::HashTable::allocateTable .*
-tc-webkit-operator              malloc  .*WTF::fastMalloc WTF::\S*::operator .*
-tc-webkit-fastmalloc            malloc  .*WTF::fastMalloc .*
-tc-v8-malloced                  malloc  .*v8::internal::Malloced::New.*
-tc-v8-nonheap                   malloc  .*v8::.*
-tc-webkit                       malloc  .*(WTF::|WebCore::|WebKit::).*
-tc-ftmemqalloc                  malloc  .*ft_mem_qalloc.*
-tc-pixman                       malloc  .*pixman_image_create_bits.*
-tc-stdstring                    malloc  .*std::string::_Rep::_S_create.*
-tc-gnualloc-rbtree              malloc  .*__gnu_cxx::new_allocator::allocate std::_Rb_tree::.*
-tc-gnualloc                     malloc  .*__gnu_cxx::new_allocator::allocate.*
-tc-sqlite                       malloc  .*sqlite3MemMalloc.*
-tc-sk                           malloc  .*sk_malloc_flags.*
-tc-no-policy                    malloc  .*
-tc-total-log                    default default
-tc-no-log                       default default
-tc-total-record                 default default
-tc-unused                       default default
-tc-total                        default default
-other-total-log                 default default