Mojo C++ bindings: support mapping mojo string to WTF::String.

third_party/WebKit/Source/platform/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("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/platform/platform.gni")
 import("//third_party/WebKit/Source/platform/platform_generated.gni")
@@ skipping 524 matching lines @@
     ":blink_common",
     ":platform",
     ":test_support",
     "//base",
     "//base/test:test_support",
     "//cc",
     "//cc:test_support",
     "//cc/blink",
     "//mojo/edk/embedder:headers",
     "//mojo/edk/test:test_support",
+    "//mojo/public/cpp/bindings/tests:for_blink_tests",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/WebKit/Source/wtf",
     "//third_party/WebKit/Source/wtf:test_support",
     "//third_party/harfbuzz-ng",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//url",
   ]
@@ skipping 39 matching lines @@
 }
 
 if (current_cpu == "x86" || current_cpu == "x64") {
   source_set("blink_x86_sse") {
     sources = blink_platform_sse_files
     deps = [
       ":blink_common",
     ]
   }
 }