BoringSSL: roll DEPS and enable dynamic visibility.

third_party/boringssl/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Config for us and everybody else depending on BoringSSL.
 config("openssl_config") {
   include_dirs = []
   include_dirs += [ "src/include" ]
+  if (is_component_build) {
+    defines += [
+      "BORINGSSL_SHARED_LIBRARY",
+    ]
+  }
 }
 
 # Config internal to this build file.
 config("openssl_internal_config") {
   visibility = ":*"  # Only targets in this file can depend on this.
 }
 
 # The list of BoringSSL files is kept in boringssl.gypi.
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("//third_party/boringssl/boringssl.gypi") ],
     "scope",
     [ "//third_party/boringssl/boringssl.gypi" ])
 
 component("boringssl") {
   sources = gypi_values.boringssl_lib_sources
 
   direct_dependent_configs = [ ":openssl_config" ]
 
   cflags = []
-  defines = []
+  defines = [ "BORINGSSL_IMPLEMENTATION" ]
+  if (is_component_build) {
+    defines += [
+      "BORINGSSL_SHARED_LIBRARY",
+    ]
+  }
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   # Also gets the include dirs from :openssl_config
   include_dirs = [
     "src/include",
     # This is for arm_arch.h, which is needed by some asm files. Since the
     # asm files are generated and kept in a different directory, they
     # cannot use relative paths to find this file.
@@ skipping 16 matching lines @@
     } else if (is_linux || is_android) {
       sources += gypi_values.boringssl_linux_x86_sources
     } else {
       defines += [ "OPENSSL_NO_ASM" ]
     }
   } else if (cpu_arch == "arm") {
     sources += gypi_values.boringssl_linux_arm_sources
   } else {
     defines += [ "OPENSSL_NO_ASM" ]
   }
-
-  if (is_component_build) {
-    if (!is_win) {
-      configs -= [ "//build/config/gcc:symbol_visibility_hidden" ]
-    }
-    if (is_posix && !is_mac) {
-      # Avoid link failures on Linux x86-64.
-      # See http://rt.openssl.org/Ticket/Display.html?id=2466&user=guest&pass=guest
-      ldflags = [ "-Wl,-Bsymbolic" ]
-    }
-  }
 }