move HelloWorld to be a peer of SampleApp

gyp/example.gyp

Index: gyp/example.gyp
diff --git a/gyp/example.gyp b/gyp/example.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..34a79828061074fa649b9734794a06d4cd1cd2c6
--- /dev/null
+++ b/gyp/example.gyp
@@ -0,0 +1,51 @@
+# GYP file to build hello world example.
+{
+  'targets': [
+    {
+      'target_name': 'HelloWorld',
+      'type': 'executable',
+      'mac_bundle' : 1,
+      'include_dirs' : [
+        '../include/gpu',
+      ],
+      'sources': [
+        '../example/HelloWorld.h',
+        '../example/HelloWorld.cpp',
+      ],
+      'dependencies': [
+        'skia_lib.gyp:skia_lib',
+        'views.gyp:views',
+      ],
+      'conditions' : [
+        [ 'skia_os == "win"', {
+          'sources' : [
+            '../src/views/win/SkOSWindow_Win.cpp',
+            '../src/views/win/skia_win.cpp',
+          ],
+        }],
+        [ 'skia_os == "mac"', {
+          'sources': [
+            '../example/mac/HelloWorldNSView.mm',
+            '../example/mac/HelloWorldDelegate.mm',
+
+            '../src/views/mac/SkEventNotifier.mm',
+            '../src/views/mac/skia_mac.mm',
+            '../src/views/mac/SkNSView.mm',
+            '../src/views/mac/SkOptionsTableView.mm',
+            '../src/views/mac/SkOSWindow_Mac.mm',
+            '../src/views/mac/SkTextFieldCell.m',
+          ],
+          'include_dirs' : [
+            '../src/views/mac/'
+          ],
+          'xcode_settings' : {
+            'INFOPLIST_FILE' : '../example/mac/HelloWorld-Info.plist',
+          },
+          'mac_bundle_resources' : [
+            '../example/mac/HelloWorld.xib'
+          ],
+        }],
+      ],
+    },
+  ],
+}