Work on the Android GN build.

ui/gl/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")
+if (is_android) {
+  import("//build/config/android/rules.gni")
+}
 
 gl_binding_output_dir = target_gen_dir
 
 config("gl_config") {
   if (use_x11) {
     defines = [ "GL_GLEXT_PROTOTYPES" ]
   }
 
   # TODO(brettw) this should be removed and the the files using the generated
   # GL bindings should use the path inside the gen directory.
@@ skipping 199 matching lines @@
       "gl_image_surface_texture.cc",
       "gl_image_surface_texture.h",
     ]
 
     defines += [
       "GL_GLEXT_PROTOTYPES",
       "EGL_EGLEXT_PROTOTYPES",
     ]
 
     libs = [ "android" ]
+
+    deps += [
+      ":gl_jni_headers",
+    ]
   }
   if (use_ozone) {
     sources += [
       "gl_context_ozone.cc",
       "gl_image_ozone.cc",
       "gl_implementation_ozone.cc",
       "gl_surface_ozone.cc",
     ]
     deps += [
       "//ui/gfx/ozone",
@@ skipping 51 matching lines @@
     "$gl_binding_output_dir/gl_mock_autogen_gl.h",
   ]
 
   args = [
     "--header-paths=" +
         rebase_path("//third_party/khronos", root_build_dir) + ":" +
         rebase_path("//third_party/mesa/src/include", root_build_dir),
     rebase_path(gl_binding_output_dir, root_build_dir),
   ]
 }
+
+if (is_android) {
+  generate_jni("gl_jni_headers") {
+    sources = [
+      "../android/java/src/org/chromium/ui/gl/SurfaceTextureListener.java",
+      "../android/java/src/org/chromium/ui/gl/SurfaceTexturePlatformWrapper.java",
+    ]
+    jni_package = "ui/gl"
+  }
+}