Update //third_party/protobuf to version 3.

third_party/protobuf/gmock.BUILD

Index: third_party/protobuf/gmock.BUILD
diff --git a/third_party/protobuf/gmock.BUILD b/third_party/protobuf/gmock.BUILD
new file mode 100644
index 0000000000000000000000000000000000000000..82abf2754086ba64a3eff9abedcb03e0ea2fa036
--- /dev/null
+++ b/third_party/protobuf/gmock.BUILD
@@ -0,0 +1,28 @@
+cc_library(
+    name = "gtest",
+    srcs = [
+        "gmock-1.7.0/gtest/src/gtest-all.cc",
+        "gmock-1.7.0/src/gmock-all.cc",
+    ],
+    hdrs = glob([
+        "gmock-1.7.0/**/*.h",
+        "gmock-1.7.0/gtest/src/*.cc",
+        "gmock-1.7.0/src/*.cc",
+    ]),
+    includes = [
+        "gmock-1.7.0",
+        "gmock-1.7.0/gtest",
+        "gmock-1.7.0/gtest/include",
+        "gmock-1.7.0/include",
+    ],
+    linkopts = ["-pthread"],
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "gtest_main",
+    srcs = ["gmock-1.7.0/src/gmock_main.cc"],
+    linkopts = ["-pthread"],
+    visibility = ["//visibility:public"],
+    deps = [":gtest"],
+)