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

mojo/public/cpp/bindings/tests/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.
 
 import("../../../mojo_application.gni")
 import("../../../mojo_sdk.gni")
 
 mojo_sdk_source_set("tests") {
   testonly = true
 
@@ skipping 31 matching lines @@
     "synchronous_connector_unittest.cc",
     "synchronous_interface_ptr_unittest.cc",
     "type_conversion_unittest.cc",
     "union_unittest.cc",
     "validation_unittest.cc",
   ]
 
   deps = [
     ":mojo_public_bindings_test_utils",
     ":validation_util",
-    "//testing/gtest",
   ]
 
   mojo_sdk_deps = [
+    "mojo/public:gtest",
     "mojo/public/cpp/bindings",
     "mojo/public/cpp/bindings:callback",
     "mojo/public/cpp/environment:standalone",
     "mojo/public/cpp/system",
     "mojo/public/cpp/test_support",
     "mojo/public/cpp/test_support:test_utils",
     "mojo/public/cpp/utility",
     "mojo/public/interfaces/bindings/tests:test_interfaces",
     "mojo/public/interfaces/bindings/tests:test_interfaces_sync",
   ]
 }
 
 mojo_sdk_source_set("perftests") {
   testonly = true
 
   sources = [
     "bindings_perftest.cc",
   ]
 
-  deps = [
-    "//testing/gtest",
-  ]
-
   mojo_sdk_deps = [
+    "mojo/public:gtest",
     "mojo/public/cpp/bindings",
     "mojo/public/cpp/bindings:callback",
     "mojo/public/cpp/environment:standalone",
     "mojo/public/cpp/system",
     "mojo/public/cpp/test_support",
     "mojo/public/cpp/utility",
     "mojo/public/interfaces/bindings/tests:test_interfaces",
   ]
 }
 
 # TODO(vardhan): This should be testonly, but for that to happen, its
 # dependents (cython etc.) need also be testonly.
 mojo_sdk_source_set("mojo_public_bindings_test_utils") {
   sources = [
     "validation_test_input_parser.cc",
     "validation_test_input_parser.h",
   ]
 }
 
 # TODO(vardhan): Merge with mojo_public_bindings_test_utils.
 mojo_sdk_source_set("validation_util") {
   testonly = true
 
   sources = [
     "validation_util.cc",
     "validation_util.h",
   ]
 
-  mojo_sdk_deps = [ "mojo/public/cpp/test_support" ]
-
   deps = [
     ":mojo_public_bindings_test_utils",
-    "//testing/gtest",
+  ]
+
+  mojo_sdk_deps = [
+    "mojo/public:gtest",
+    "mojo/public/cpp/test_support",
   ]
 }
 
 mojo_native_application("versioning_test_service") {
   testonly = true
 
   deps = [
     ":versioning_test_service_source_set",
   ]
 }
@@ skipping 34 matching lines @@
   ]
 
   mojo_sdk_deps = [
     "mojo/public/cpp/application:standalone",
     "mojo/public/cpp/application:test_support_standalone",
     "mojo/public/cpp/bindings",
     "mojo/public/cpp/system",
     "mojo/public/interfaces/bindings/tests:versioning_test_client_interfaces",
   ]
 }