deep_memory_profiler: Replace 'WebCore' with 'blink'.

tools/deep_memory_profiler/policy.linux.browser.json

 {
   "components": [
     "second",
     "mmap-profiler",
     "mmap-type-profiler",
     "mmap-tcmalloc",
     "FROM_HERE_FOR_TOTAL",
     "mustbezero",
     "unhooked-absent",
     "unhooked-anonymous",
@@ skipping 180 matching lines @@
       "stacktrace": ".*gpu::gles2::BufferTracker::CreateBuffer.*",
       "allocator": "mmap"
     },
     {
       "name": "mmap-skia-font",
       "stacktrace": ".*SkTypeface::openStream.*",
       "allocator": "mmap"
     },
     {
       "name": "mmap-blink-css",
-      "stacktrace": ".*WebCore::Element::createPseudo.*",
+      "stacktrace": ".*blink::Element::createPseudo.*",
       "allocator": "mmap"
     },
     {
       "name": "mmap-blink-document",
-      "stacktrace": ".*WebCore::.*(DocumentType::Comment|Text|(HTML|SVG).*Element)::create.*",
+      "stacktrace": ".*blink::.*(DocumentType::Comment|Text|(HTML|SVG).*Element)::create.*",
       "allocator": "mmap"
     },
     {
       "name": "mmap-blink-layout",
-      "stacktrace": ".*WebCore::Render.*",
+      "stacktrace": ".*blink::Render.*",
       "allocator": "mmap"
     },
     {
       "name": "mmap-catch-all",
       "stacktrace": ".*",
       "allocator": "mmap"
     },
     {
       "name": "tc-histogram",
       "stacktrace": ".*([hH]istogram|UseCount).*",
@@ skipping 85 matching lines @@
       "stacktrace": ".*extensions::.*",
       "allocator": "malloc"
     },
     {
       "name": "tc-bookmark-codec",
       "stacktrace": ".*BookmarkCodec::.*",
       "allocator": "malloc"
     },
     {
       "name": "tc-blink-css",
-      "stacktrace": ".*(WTF::|WebCore::|WebKit::).*(CSS|Style|Sheet).*",
+      "stacktrace": ".*(WTF::|blink::|WebKit::).*(CSS|Style|Sheet).*",
       "allocator": "malloc"
     },
     {
       "name": "tc-webkit-catch-all",
-      "stacktrace": ".*(WTF::|WebCore::|WebKit::).*",
+      "stacktrace": ".*(WTF::|blink::|WebKit::).*",
       "allocator": "malloc"
     },
     {
       "name": "tc-v8-catch-all",
       "stacktrace": ".*v8::.*",
       "allocator": "malloc"
     },
     {
       "name": "tc-toplevel-string",
       "stacktrace": "std::basic_string::_Rep::_S_create",
@@ skipping 75 matching lines @@
       "allocator": "optional"
     },
     {
       "name": "other",
       "stacktrace": "optional",
       "allocator": "optional"
     }
   ],
   "version": "POLICY_DEEP_3"
 }