mojo/public: Include gtest.h as "gtest/gtest.h", instead of via "absolute" path.

mojo/public/c/BUILD.gn

 # Copyright 2016 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.
 
 import("../mojo_sdk.gni")
 
 config("c_config") {
   include_dirs = [ "include" ]
 }
 
@@ skipping 56 matching lines @@
     "tests/bindings/buffer_unittest.cc",
     "tests/bindings/message_unittest.cc",
     "tests/bindings/struct_unittest.cc",
     "tests/bindings/testing_util.h",
     "tests/bindings/union_unittest.cc",
     "tests/bindings/validation_unittest.cc",
   ]
 
   deps = [
     ":bindings",
-    "//testing/gtest",
   ]
 
   mojo_sdk_deps = [
+    "mojo/public:gtest",
     "mojo/public/cpp/bindings/tests:mojo_public_bindings_test_utils",
     "mojo/public/cpp/bindings/tests:validation_util",
     "mojo/public/cpp/test_support",
     "mojo/public/cpp/system",
 
     # The "_c" suffix'd target compiles the generated C bindings to this mojom
     # target.
     "mojo/public/interfaces/bindings/tests:test_interfaces_c",
   ]
 }
@@ skipping 16 matching lines @@
 mojo_sdk_source_set("common_unittests") {
   testonly = true
 
   sources = [
     "tests/macros_unittest.cc",
     "tests/result_unittest.cc",
   ]
 
   deps = [
     ":common",
-    "//testing/gtest",
   ]
+
+  mojo_sdk_deps = [ "mojo/public:gtest" ]
 }
 
 # environment ------------------------------------------------------------------
 
 # Headers in include/mojo/environment (to be included as
 # <mojo//environment/HEADER.h>).
 #
 # Depends on :system (and thus :common).
 
 mojo_sdk_source_set("environment") {
@@ skipping 164 matching lines @@
     "tests/system/data_pipe_unittest.cc",
     "tests/system/handle_unittest.cc",
     "tests/system/message_pipe_unittest.cc",
     "tests/system/time_unittest.cc",
     "tests/system/wait_set_unittest.cc",
     "tests/system/wait_unittest.cc",
   ]
 
   deps = [
     ":system",
-    "//testing/gtest",
   ]
+
+  mojo_sdk_deps = [ "mojo/public:gtest" ]
 }
 
 mojo_sdk_source_set("system_perftests") {
   testonly = true
 
   sources = [
     "tests/system/message_pipe_perftest.cc",
     "tests/system/perftest_utils.cc",
     "tests/system/perftest_utils.h",
     "tests/system/reference_perftest.cc",
     "tests/system/wait_set_perftest.cc",
   ]
 
   deps = [
     ":system",
-    "//testing/gtest",
   ]
 
-  mojo_sdk_deps = [ "mojo/public/cpp/test_support" ]
+  mojo_sdk_deps = [
+    "mojo/public:gtest",
+    "mojo/public/cpp/test_support",
+  ]
 }
 
 # Compilation tests ------------------------------------------------------------
 
 # This test ensures that various headers compile and link properly.
 mojo_sdk_source_set("compile_unittests") {
   testonly = true
 
   sources = [
     "tests/compile/compile_unittest.cc",
   ]
 
   deps = [
     ":pure_compile_tests",
-    "//testing/gtest",
   ]
+
+  mojo_sdk_deps = [ "mojo/public:gtest" ]
 }
 
 # This source set contains "pure" tests that only depend on the public SDK (and
 # the standard library), and in particular not on gtest (whose headers don't
 # compile with "-Wundef").
 mojo_sdk_source_set("pure_compile_tests") {
   testonly = true
 
   visibility = [ ":compile_unittests" ]
 
   cflags = [ "-Wundef" ]
 
   sources = [
     "tests/compile/pure_c.c",
     "tests/compile/pure_cpp.cc",
   ]
 
   mojo_sdk_deps = [ "mojo/public/c:environment" ]
 }