Update Crashpad to b6f2d06996335c951bfb72f98b5b9e22dc9bc03e

b6f2d0699633 [Android] Fix un-paired namespace declare for higher
             __ANDROID_API__

Change-Id: I6894e4f9a9455f180fdca0b81e8540ff4613f727
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2527799
Commit-Queue: Yuchen Liu <yucliu@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Auto-Submit: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825699}

third_party/crashpad/README.chromium

@@ -2,7 +2,7 @@ Name: Crashpad
 Short Name: crashpad
 URL: https://crashpad.chromium.org/
 Version: unknown
-Revision: ca944aeb88ff299346ecd6eadbf9c0eb9761fe7a
+Revision: b6f2d06996335c951bfb72f98b5b9e22dc9bc03e
 License: Apache 2.0
 License File: crashpad/LICENSE
 Security Critical: yes

third_party/crashpad/crashpad/util/linux/initial_signal_dispositions.cc

@@ -20,9 +20,10 @@
 #include "base/logging.h"
 #include "build/build_config.h"
 
+namespace crashpad {
+
 #if __ANDROID_API__ <= 23
 
-namespace crashpad {
 namespace {
 bool LoggingSignal(int signum, sighandler_t handler) {
   sighandler_t previous = signal(signum, handler);