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

tools/deep_memory_profiler/policy.l2.txt

+heap profile policy: POLICY_DEEP_2
+# Read policy.README for description of this file.
+second                          optional        optional
+mmap-profiler                   mmap    .*(ProfilerMalloc|MemoryRegionMap::).*
+mmap-tcmalloc                   mmap    .*(DoAllocWithArena|SbrkSysAllocator::Alloc|MmapSysAllocator::Alloc|LowLevelAlloc::Alloc|LowLevelAlloc::AllocWithArena).*
+FROM_HERE_FOR_TOTAL             optional        optional
+mustbezero                      optional        optional
+nonprofiled-absent              optional        optional
+nonprofiled-anonymous           optional        optional
+nonprofiled-file-exec           optional        optional
+nonprofiled-file-nonexec        optional        optional
+nonprofiled-stack               optional        optional
+nonprofiled-other               optional        optional
+no-bucket                       default default
+mmap-v8-heap-newspace           mmap    .*v8::internal::NewSpace::SetUp.*
+mmap-v8-heap-coderange          mmap    .*v8::internal::CodeRange::SetUp.*
+mmap-v8-heap-pagedspace         mmap    .*v8::internal::PagedSpace::AllocateRaw.*
+mmap-v8-other                   mmap    .*v8::.*
+mmap-catch-all                  mmap    .*
+tc-webcore-fontcache            malloc  .*WebCore::FontCache::getCachedFontData.*
+tc-skia                         malloc  .* Sk[A-Za-z_]+::.*
+tc-renderobject                 malloc  .*WebCore::RenderArena::allocate.*
+tc-renderstyle                  malloc  .*WebCore::RenderStyle::create.*
+tc-renderstyle                  malloc  .*WebCore::RenderStyle::clone.*
+tc-webcore-sharedbuf            malloc  .*WebCore::SharedBuffer::create.*
+tc-webcore-sharedbuf            malloc  .*WebCore::SharedBuffer::buffer.*
+tc-webcore-sharedbuf            malloc  .*WebCore::SharedBuffer::append.*
+tc-webcore-XHRcreate            malloc  .*WebCore::XMLHttpRequest::create .*
+tc-webcore-XHRreceived          malloc  .*WebCore::XMLHttpRequest::didReceiveData.*
+tc-webcore-docwriter-add        malloc  .*WebCore::DocumentWriter::addData.*
+tc-webcore-node-and-doc         malloc  .*WebCore::HTML[a-zA-Z0-9_]*Element::create .*
+tc-webcore-node-and-doc         malloc  .*WebCore::Text::create .*
+tc-webcore-node-and-doc         malloc  .*WebCore::Comment::create .*
+tc-webcore-node-and-doc         malloc  .*WebCore::HTMLDocument::create .*
+tc-webcore-node-and-doc         malloc  .*WebCore::CSSStyleRule::create .*
+tc-webcore-node-and-doc         malloc  .*WebCore::Attribute::create .*
+tc-webcore-node-and-doc         malloc  .*WebCore::DOMWindow::create .*
+tc-webcore-node-factory         malloc  .*WebCore::HTML[a-zA-Z0-9_]*Factory::create[a-zA-Z0-9_]*Element.*
+tc-webcore-element-wrapper      malloc  .*WebCore::createHTML[a-zA-Z0-9_]*ElementWrapper.*
+tc-webcore-stylepropertyset     malloc  .*WebCore::StylePropertySet::create .*
+tc-webcore-style-createsheet    malloc  .*WebCore::StyleElement::createSheet.*
+tc-webcore-cachedresource       malloc  .*WebCore::CachedResource::data .*
+tc-webcore-cachedresource       malloc  .*WebCore::CachedResource::load .*
+tc-webcore-script-execute       malloc  .*WebCore::ScriptElement::execute.*
+tc-webcore-events-related       malloc  .*WebCore::createAttributeEventListener.*
+tc-webcore-events-related       malloc  .*WebCore::V8LazyEventListener::create.*
+tc-webcore-events-related       malloc  .*WebCore::V8EventListener::create.*
+tc-webcore-events-related       malloc  .*WebCore::Event::create .*
+tc-webcore-events-related       malloc  .*WebCore::EventListener::create .*
+tc-webcore-document-write       malloc  .*WebCore::Document::write.*
+tc-webcore-node-create-renderer malloc  .*WebCore::Node::createRendererIfNeeded.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderLayer.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderBlock.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderWidget.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderView.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderViewImpl.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderStyle.*
+tc-webcore-render-catch-all       malloc  .*WebCore::RenderText.*
+tc-webcore-render-catch-all       malloc  .* RendererMain .*
+tc-webcore-setInnerHTML-except-node         malloc      .*WebCore::HTMLElement::setInnerHTML.*
+tc-wtf-StringImpl-user-catch-all                malloc  .*WTF::StringImpl::create .*
+tc-wtf-StringImpl-user-catch-all                malloc  .*WTF::StringImpl::createUninitialized.*
+tc-wtf-HashTable-user-catch-all         malloc  .*WTF::HashTable::allocateTable.*
+#tc-wtf-fastmalloc-user-catch-all       malloc  .*WTF::fastMalloc .*
+tc-webcore-everything-create    malloc  .*WebCore::[a-zA-Z0-9_]*::create .*
+tc-webkit-from-v8-catch-all     malloc  .*(WTF::|WebCore::|WebKit::).*v8::.*
+tc-webkit-catch-all             malloc  .*(WTF::|WebCore::|WebKit::).*
+tc-v8-catch-all                 malloc  .*v8::.*
+tc-toplevel-string              malloc  std::basic_string::_Rep::_S_create
+tc-catch-all                    malloc  .*
+tc-unused                       default default
+UNTIL_HERE_FOR_TOTAL            optional        optional
+total-exclude-profiler          optional        optional
+total                           optional        optional
+anonymous                       optional        optional
+file-exec                       optional        optional
+file-nonexec                    optional        optional
+stack                           optional        optional
+other                           optional        optional
+mmap-total-log                  default default
+mmap-no-log                     default default
+mmap-total-record               default default
+other-total-log                 default default
+tc-total-log                    default default
+tc-no-log                       default default
+tc-total-record                 default default
+tc-total                        default default