[Remoting Android] Fix thread issue with OpenGL drawable

remoting/client/display/gl_desktop.cc

Index: remoting/client/display/gl_desktop.cc
diff --git a/remoting/client/display/gl_desktop.cc b/remoting/client/display/gl_desktop.cc
index 41cb463209dfc4f1dbf716008bfebbd14eebb21b..946e7105000c3c7918cd6e751bf173de717d60cd 100644
--- a/remoting/client/display/gl_desktop.cc
+++ b/remoting/client/display/gl_desktop.cc
@@ -57,7 +57,9 @@ struct GlDesktop::GlDesktopTextureContainer {
   webrtc::DesktopRect rect;
 };
 
-GlDesktop::GlDesktop() : weak_factory_(this) {}
+GlDesktop::GlDesktop() : weak_factory_(this) {
+  weak_ptr_ = weak_factory_.GetWeakPtr();
+}
 
 GlDesktop::~GlDesktop() {}
 
@@ -84,7 +86,6 @@ void GlDesktop::SetVideoFrame(const webrtc::DesktopFrame& frame) {
 }
 
 bool GlDesktop::Draw() {
-  DCHECK(thread_checker_.CalledOnValidThread());
   if (!textures_.empty() && !last_desktop_size_.is_empty()) {
     for (std::unique_ptr<GlDesktopTextureContainer>& texture : textures_) {
       texture->layer->Draw(1.0f);
@@ -132,8 +133,7 @@ void GlDesktop::ReallocateTextures(const webrtc::DesktopSize& size) {
 }
 
 base::WeakPtr<Drawable> GlDesktop::GetWeakPtr() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return weak_factory_.GetWeakPtr();
+  return weak_ptr_;
 }
 
 }  // namespace remoting