Restructure public side of view_manager service.

mojo/services/public/mojo_services_public.gyp

Index: mojo/services/public/mojo_services_public.gyp
diff --git a/mojo/services/public/mojo_services_public.gyp b/mojo/services/public/mojo_services_public.gyp
index be8e519926fe3f6fa4ced59816049214a2ceb363..c0686875b949010d07158bccd7a88bc2144fd562 100644
--- a/mojo/services/public/mojo_services_public.gyp
+++ b/mojo/services/public/mojo_services_public.gyp
@@ -176,20 +176,20 @@
       ],
     },
     {
-      # GN version: //mojo/services/public/cpp/view_manager:common
+      # GN version: //mojo/services/view_manager/public/cpp:common
       'target_name': 'mojo_view_manager_common',
       'type': 'static_library',
       'sources': [
-        'cpp/view_manager/types.h',
+        '../view_manager/public/cpp/types.h',
       ],
     },
     {
-      # GN version: //mojo/services/public/interfaces/view_manager
+      # GN version: //mojo/services/view_manager/public/interfaces/
       'target_name': 'mojo_view_manager_bindings',
       'type': 'static_library',
       'sources': [
-        'interfaces/view_manager/view_manager.mojom',
-        'interfaces/view_manager/view_manager_constants.mojom',
+        '../view_manager/public/interfaces/view_manager.mojom',
+        '../view_manager/public/interfaces/view_manager_constants.mojom',
       ],
       'includes': [ '../../public/tools/bindings/mojom_bindings_generator.gypi' ],
       'dependencies': [
@@ -249,7 +249,7 @@
       'target_name': 'mojo_window_manager_bindings',
       'type': 'static_library',
       'sources': [
-        'interfaces/window_manager/window_manager.mojom',
+        '../window_manager/public/interfaces/window_manager.mojom',
       ],
       'includes': [ '../../public/tools/bindings/mojom_bindings_generator.gypi' ],
       'dependencies': [