Split targets with external dependencies out of mojo_public.gypi

mojo/mojo_services.gypi

Index: mojo/mojo_services.gypi
diff --git a/mojo/mojo_services.gypi b/mojo/mojo_services.gypi
index 43d2718a7adc34b4d608b7973f038e6fd5333051..c11a4bf537a687764697dc4da4a975ac3ca0c928 100644
--- a/mojo/mojo_services.gypi
+++ b/mojo/mojo_services.gypi
@@ -143,6 +143,42 @@
       ],
     },
     {
+      'target_name': 'mojo_gles2',
+      'type': 'shared_library',
+      'defines': [
+        'MOJO_GLES2_IMPLEMENTATION',
+        'GLES2_USE_MOJO',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'dependencies': [
+        '../third_party/khronos/khronos.gyp:khronos_headers'
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '..',
+        ],
+        'defines': [
+          'GLES2_USE_MOJO',
+        ],
+      },
+      'sources': [
+        'public/c/gles2/gles2.h',
+        'public/c/gles2/gles2_export.h',
+        'public/gles2/gles2_private.cc',
+        'public/gles2/gles2_private.h',
+      ],
+      'conditions': [
+        ['OS=="mac"', {
+          'xcode_settings': {
+            # Make it a run-path dependent library.
+            'DYLIB_INSTALL_NAME_BASE': '@loader_path',
+          },
+        }],
+      ],
+    },
+    {
       'target_name': 'mojo_gles2_bindings',
       'type': 'static_library',
       'sources': [