Qualify the generated includes in platform.

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("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/platform/platform_generated.gni")
 
 platform_gypi = exec_script(
@@ skipping 167 matching lines @@
     "//third_party/WebKit/Source:non_test_config",
   ]
 
   defines = [
     "BLINK_PLATFORM_IMPLEMENTATION=1",
     "INSIDE_BLINK",
   ]
 
   include_dirs = [
     #"$angle_path/include",
-    # FIXME: This should be removed once files include the generated files with
-    # the correct path.
-    "$root_gen_dir/blink/platform",
+    "$root_gen_dir/blink",
   ]
 
   deps = [
     ":make_platform_generated",
     "//gpu/command_buffer/client:gles2_c_lib",
     "//skia",
     "//third_party:jpeg",
     "//third_party/harfbuzz-ng",
     "//third_party/iccjpeg",
     "//third_party/icu",
@@ skipping 257 matching lines @@
 
     deps = [ ":blink_common" ]
   }
 }
 
 # This config is a placeholder to set up the V8 include path while the V8 GN
 # build is being worked on.
 config("v8_stub_config") {
   include_dirs = [ "//v8/include" ]
 }