Fix pretty-printer for WTF::String

It broke with:

https://chromium-review.googlesource.com/c/chromium/src/+/2301589

Also, add my self to OWNERS, because I care.

Change-Id: Ibb344fc4f432b5d3815ea40ab8e121e9403fa513
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2316946Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Albert J. Wong <ajwong@chromium.org>
Commit-Queue: Stefan Zager <szager@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791496}

third_party/blink/tools/gdb/blink.py

@@ -135,7 +135,7 @@ class WTFStringImplPrinter(StringPrinter):
             self.get_length())
 
     def is_8bit(self):
-        return self.val['is_8bit_']
+        return int(str(self.val['hash_and_flags_'])) % 2
 
 
 class WTFStringPrinter(StringPrinter):

tools/gdb/OWNERS

 jbroman@chromium.org
+szager@chromium.org
 thomasanderson@chromium.org
 tikuta@chromium.org

tools/gdb/gdb_chrome.py

@@ -454,6 +454,17 @@ pp_set.add_printer('content::RenderProcessHostImpl',
                    '^content::RenderProcessHostImpl$',
                    RenderProcessHostImplPrinter)
 
+
+class AtomicPrinter(Printer):
+  typename = 'atomic'
+
+  def to_string(self):
+    return self.val['__a_']['__a_value']
+
+
+pp_set.add_printer('std::__Cr::atomic', '^std::__Cr::atomic<.*>$',
+                   AtomicPrinter)
+
 gdb.printing.register_pretty_printer(gdb, pp_set, replace=_DEBUGGING)
 """Implementations of inlined libc++ std container functions."""