Memory-infra: whitelist Omnibox urlindex MDP

BUG=803822

Change-Id: I6d635e220a5e7a1bf0001426ac4e6c643b90b8fd
Reviewed-on: https://chromium-review.googlesource.com/892466Reviewed-by: Dmitry Skiba <dskiba@chromium.org>
Commit-Queue: Siddhartha S <ssid@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533573}

base/trace_event/memory_infra_background_whitelist.cc

@@ -29,6 +29,7 @@ const char* const kDumpProviderWhitelist[] = {
     "gpu::TextureManager",
     "HistoryReport",
     "IndexedDBBackingStore",
+    "InMemoryURLIndex",
     "JavaHeap",
     "LevelDB",
     "LeveldbValueStore",
@@ -164,6 +165,7 @@ const char* const kAllocatorDumpNameWhitelist[] = {
     "net/url_request_context/unknown/0x?/http_cache/memory_backend",
     "net/url_request_context/unknown/0x?/http_cache/simple_backend",
     "net/url_request_context/unknown/0x?/http_network_session",
+    "omnibox/in_memory_url_index_0x?",
     "web_cache/Image_resources",
     "web_cache/CSS stylesheet_resources",
     "web_cache/Script_resources",