mojo: Convert gles2 to the new thunking system

mojo/shell/in_process_dynamic_service_runner.cc

 // 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.
 
 #include "mojo/shell/in_process_dynamic_service_runner.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
+#include "mojo/public/platform/native/gles2_thunks.h"
 #include "mojo/public/platform/native/system_thunks.h"
 
 namespace mojo {
 namespace shell {
 
 InProcessDynamicServiceRunner::InProcessDynamicServiceRunner(
     Context* context)
     : keep_alive_(context) {
 }
 
@@ skipping 57 matching lines @@
       }
     } else {
       // In the component build, Mojo Apps link against mojo_system_impl.
 #if !defined(COMPONENT_BUILD)
       // Strictly speaking this is not required, but it's very unusual to have
       // an app that doesn't require the basic system library.
       LOG(WARNING) << "MojoSetSystemThunks not found in app library";
 #endif
     }
 
+    MojoSetGLES2ThunksFn mojo_set_gles2_thunks_fn =
+        reinterpret_cast<MojoSetGLES2ThunksFn>(app_library_.GetFunctionPointer(
+            "MojoSetGLES2Thunks"));
+    if (mojo_set_gles2_thunks_fn) {
+      MojoGLES2Thunks gles2_thunks = MojoMakeGLES2Thunks();
+      size_t expected_size = mojo_set_gles2_thunks_fn(&gles2_thunks);
+      if (expected_size > sizeof(MojoGLES2Thunks)) {
+        LOG(ERROR)
+            << "Invalid app library: expected MojoGLES2Thunks size: "
+            << expected_size;
+        break;
+      }
+    }
+    // Unlike system thunks, we don't warn on a lack of GLES2 thunks because
+    // not everything is a visual app.
+
     typedef MojoResult (*MojoMainFunction)(MojoHandle);
     MojoMainFunction main_function = reinterpret_cast<MojoMainFunction>(
         app_library_.GetFunctionPointer("MojoMain"));
     if (!main_function) {
       LOG(ERROR) << "Entrypoint MojoMain not found";
       break;
     }
 
     // |MojoMain()| takes ownership of the service handle.
     MojoResult result = main_function(service_handle_.release().value());
     if (result < MOJO_RESULT_OK)
       LOG(ERROR) << "MojoMain returned an error: " << result;
   } while (false);
 
   bool success = app_completed_callback_runner_.Run();
   app_completed_callback_runner_.Reset();
   LOG_IF(ERROR, !success) << "Failed post run app_completed_callback";
 }
 
 }  // namespace shell
 }  // namespace mojo