Annual rotation of the pinned CUP public key.

Key 10 is available as of 2020-02-10.

Bug: None
Change-Id: I7c2c093ac0b871ac02d8bfe793b22f72db81f4dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2049910
Auto-Submit: Joshua Pawlicki <waffles@chromium.org>
Reviewed-by: Sorin Jianu <sorin@chromium.org>
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744296}

components/update_client/request_sender.cc

@@ -24,10 +24,10 @@ namespace update_client {
 namespace {
 
 // This is an ECDSA prime256v1 named-curve key.
-constexpr int kKeyVersion = 9;
+constexpr int kKeyVersion = 10;
 const char kKeyPubBytesBase64[] =
-    "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEsVwVMmIJaWBjktSx9m1JrZWYBvMm"
-    "bsrGGQPhScDtao+DloD871YmEeunAaQvRMZgDh1nCaWkVG6wo75+yDbKDA==";
+    "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEzOqC8cKNUYIi0UkNu0smZKDW8w5/"
+    "0EmEw1KQ6Aj/5JWBMdUVm13EIVwFwPlkO/U6vXa+iu4wyUB89GFaldJ7Bg==";
 
 }  // namespace