mojo: Convert gles2 to the new thunking system

mojo/shell/in_process_dynamic_service_runner.cc

Index: mojo/shell/in_process_dynamic_service_runner.cc
diff --git a/mojo/shell/in_process_dynamic_service_runner.cc b/mojo/shell/in_process_dynamic_service_runner.cc
index 3bfb163462ce500a29cc80b8d3d235397d6ea136..c0b5df98fd8804d33c0e6a3b7537d81f825b1234 100644
--- a/mojo/shell/in_process_dynamic_service_runner.cc
+++ b/mojo/shell/in_process_dynamic_service_runner.cc
@@ -9,6 +9,7 @@
 #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 {
@@ -86,6 +87,22 @@ void InProcessDynamicServiceRunner::Run() {
 #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"));