Adding drawable to CRD andorid and iOS gl rendering pipeline.

remoting/client/display/sys_opengl.h

Index: remoting/client/display/sys_opengl.h
diff --git a/remoting/client/display/sys_opengl.h b/remoting/client/display/sys_opengl.h
index 90abd6be0bccb0ec6aea225e6310b6614ef8e881..3040b65284e31a7675ca6be60a7b0709d0984286 100644
--- a/remoting/client/display/sys_opengl.h
+++ b/remoting/client/display/sys_opengl.h
@@ -17,6 +17,8 @@
 #define GL_GLEXT_PROTOTYPES
 #include <OpenGL/gl.h>
 #include <OpenGL/glext.h>
+#elif defined(OS_ANDROID)
+#include <EGL/egl.h>

[Yuwei, 2017/01/09 22:41:54]

Why is EGL included here? I think it's only used the EglThreadContext... Also
OpenGL and EGL are different components.

[nicholss, 2017/01/09 22:51:12]

I am trying to make the android side compile. GLES3/gl3.h is not being found for
android. I am not sure how it worked before... Any ideas?

I might have fixed it in the build file with:

```
libs = [
      "OpenSLES",
      "EGL",
    ]
```

But need to revert this change.

[Yuwei, 2017/01/09 23:06:37]

Yeah but why EGL/egl.h...
I felt like it's related to moving sys_opengl.h into this directory but this
doesn't explain why your previous CL compiles...

Maybe you can try adding this to display/BUILD.gn:

if (OS_ANDROID) {
  libs = ["GLESv2"]
}

This dependency wasn't specified but the compiler still somehow worked...

 #else
 #include <GLES3/gl3.h>
 #endif  // defined(OS_IOS)