Call 'InitializeDynamicBindings()' before gl calls.

Some gl functions have not been bound,if no context created before.

BUG=

Review-Url: https://codereview.chromium.org/2273483004
Cr-Commit-Position: refs/heads/master@{#415533}

ui/gl/init/gl_factory_android.cc

@@ -60,8 +60,9 @@ bool GLNonOwnedContext::Initialize(GLSurface* compatible_surface,
 }
 
 bool GLNonOwnedContext::MakeCurrent(GLSurface* surface) {
-  SetCurrent(surface);
   SetRealGLApi();
+  SetCurrent(surface);
+  InitializeDynamicBindings();
   return true;
 }