Roll src/third_party/boringssl/src 7e5dd25d4..61dedd6

https://boringssl.googlesource.com/boringssl/+log/7e5dd25d47face6deb452823ae4f40c4c7ca375a..61dedd681501616de5928fe5c0eac6640d4de0c1

BUG=none

Change-Id: I1076026b3ff031422561e13da7febf0a0ed0bfda
Reviewed-on: https://chromium-review.googlesource.com/909652
Commit-Queue: David Benjamin <davidben@chromium.org>
Commit-Queue: Steven Valdez <svaldez@chromium.org>
Reviewed-by: Steven Valdez <svaldez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535572}

DEPS

@@ -111,7 +111,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.
-  'boringssl_revision': '7e5dd25d47face6deb452823ae4f40c4c7ca375a',
+  'boringssl_revision': '61dedd681501616de5928fe5c0eac6640d4de0c1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling google-toolbox-for-mac
   # and whatever else without interference from each other.

third_party/boringssl/BUILD.generated.gni

@@ -81,7 +81,6 @@ crypto_sources = [
   "src/crypto/cpu-ppc64le.c",
   "src/crypto/crypto.c",
   "src/crypto/curve25519/spake25519.c",
-  "src/crypto/curve25519/x25519-x86_64.c",
   "src/crypto/dh/check.c",
   "src/crypto/dh/dh.c",
   "src/crypto/dh/dh_asn1.c",
@@ -344,6 +343,7 @@ ssl_sources = [
   "src/ssl/d1_srtp.cc",
   "src/ssl/dtls_method.cc",
   "src/ssl/dtls_record.cc",
+  "src/ssl/handoff.cc",
   "src/ssl/handshake.cc",
   "src/ssl/handshake_client.cc",
   "src/ssl/handshake_server.cc",
@@ -462,7 +462,6 @@ crypto_sources_linux_x86_64 = [
   "linux-x86_64/crypto/fipsmodule/vpaes-x86_64.S",
   "linux-x86_64/crypto/fipsmodule/x86_64-mont.S",
   "linux-x86_64/crypto/fipsmodule/x86_64-mont5.S",
-  "src/crypto/curve25519/asm/x25519-asm-x86_64.S",
 ]
 
 crypto_sources_mac_x86 = [
@@ -499,7 +498,6 @@ crypto_sources_mac_x86_64 = [
   "mac-x86_64/crypto/fipsmodule/vpaes-x86_64.S",
   "mac-x86_64/crypto/fipsmodule/x86_64-mont.S",
   "mac-x86_64/crypto/fipsmodule/x86_64-mont5.S",
-  "src/crypto/curve25519/asm/x25519-asm-x86_64.S",
 ]
 
 crypto_sources_win_x86 = [