Update third_party/flatbuffers

Bug: 834710
Change-Id: I447f01b540cb35dd941b045d4d2934d4990c2ae2
Reviewed-on: https://chromium-review.googlesource.com/1148460Reviewed-by: Balazs Engedy <engedy@chromium.org>
Commit-Queue: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583784}

DEPS

@@ -623,7 +623,7 @@ deps = {
     Var('chromium_git') + '/chromium/deps/flac.git' + '@' + 'af862024c8c8fa0ae07ced05e89013d881b00596',
 
   'src/third_party/flatbuffers/src':
-    Var('chromium_git') + '/external/github.com/google/flatbuffers.git' + '@' + '01c50d57a67a52ee3cddd81b54d4647e9123a290',
+    Var('chromium_git') + '/external/github.com/google/flatbuffers.git' + '@' + 'c721009491dc8275052cf33f7334e015ed737927',
 
   # Used for embedded builds. CrOS & Linux use the system version.
   'src/third_party/fontconfig/src': {

third_party/flatbuffers/BUILD.gn

@@ -35,24 +35,35 @@ source_set("compiler_files") {
     "src/grpc/src/compiler/cpp_generator.h",
     "src/grpc/src/compiler/go_generator.cc",
     "src/grpc/src/compiler/go_generator.h",
+    "src/grpc/src/compiler/java_generator.cc",
+    "src/grpc/src/compiler/java_generator.h",
     "src/grpc/src/compiler/schema_interface.h",
+    "src/include/flatbuffers/base.h",
     "src/include/flatbuffers/code_generators.h",
+    "src/include/flatbuffers/flatbuffers.h",
     "src/include/flatbuffers/flatc.h",
     "src/include/flatbuffers/flexbuffers.h",
     "src/include/flatbuffers/grpc.h",
     "src/include/flatbuffers/hash.h",
     "src/include/flatbuffers/idl.h",
+    "src/include/flatbuffers/minireflect.h",
     "src/include/flatbuffers/reflection.h",
     "src/include/flatbuffers/reflection_generated.h",
+    "src/include/flatbuffers/registry.h",
+    "src/include/flatbuffers/stl_emulation.h",
     "src/include/flatbuffers/util.h",
     "src/src/code_generators.cpp",
     "src/src/flatc.cpp",
     "src/src/idl_gen_cpp.cpp",
+    "src/src/idl_gen_dart.cpp",
     "src/src/idl_gen_fbs.cpp",
     "src/src/idl_gen_general.cpp",
     "src/src/idl_gen_go.cpp",
     "src/src/idl_gen_grpc.cpp",
     "src/src/idl_gen_js.cpp",
+    "src/src/idl_gen_json_schema.cpp",
+    "src/src/idl_gen_lobster.cpp",
+    "src/src/idl_gen_lua.cpp",
     "src/src/idl_gen_php.cpp",
     "src/src/idl_gen_python.cpp",
     "src/src/idl_gen_text.cpp",

third_party/flatbuffers/README.chromium

 Name: FlatBuffers
 Short Name: flatbuffers
 URL: https://github.com/google/flatbuffers
-Version: 01c50d57a67a52ee3cddd81b54d4647e9123a290
-Date: 2017-06-05
+Version: 5d3648b88a91e8a5d67db83df2d08bb9e8702ae8
+Date: 2018-07-24
 License: Apache 2.0
 License File: LICENSE
 Security Critical: yes