Use base::FastHash() in //ipc

base::Hash() is deprecated and is being replaced by base::FastHash().
The output of base::FastHash() is only fixed within the lifetime of a
single process, so if the code depends on the mapping of inputs to hash
outputs not changing over time, base::PersistentHash() must be used
instead.

Bug: 1025358
Change-Id: Ib947ff8e511ec7399aaf589d9c1abcd5ef34c6d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1922951
Auto-Submit: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#716697}

ipc/ipc_mojo_bootstrap.cc

@@ -107,8 +107,8 @@ struct MessageMemoryDumpInfo {
 
 struct MessageMemoryDumpInfoHash {
   size_t operator()(const MessageMemoryDumpInfo& info) const {
-    return base::HashInts32(
-        info.id, info.profiler_tag ? base::Hash(info.profiler_tag) : 0);
+    return base::HashInts(
+        info.id, info.profiler_tag ? base::FastHash(info.profiler_tag) : 0);
   }
 };