Add lock back to SharedRendererState

android_webview/browser/shared_renderer_state.cc

Index: android_webview/browser/shared_renderer_state.cc
diff --git a/android_webview/browser/shared_renderer_state.cc b/android_webview/browser/shared_renderer_state.cc
index fb17afbbcdc2fa89ce23feb2a130397963d5869e..1e824382eabebb9d079a6f43cd7596c8a61e0956 100644
--- a/android_webview/browser/shared_renderer_state.cc
+++ b/android_webview/browser/shared_renderer_state.cc
@@ -47,20 +47,24 @@ void SharedRendererState::ClientRequestDrawGLOnUIThread() {
 
 void SharedRendererState::SetCompositorOnUiThread(
     content::SynchronousCompositor* compositor) {
+  base::AutoLock lock(lock_);
   DCHECK(ui_loop_->BelongsToCurrentThread());
   compositor_ = compositor;
 }
 
 content::SynchronousCompositor* SharedRendererState::GetCompositor() {
+  base::AutoLock lock(lock_);
   DCHECK(compositor_);
   return compositor_;
 }
 
 void SharedRendererState::SetDrawGLInput(const DrawGLInput& input) {
+  base::AutoLock lock(lock_);
   draw_gl_input_ = input;
 }
 
 DrawGLInput SharedRendererState::GetDrawGLInput() const {
+  base::AutoLock lock(lock_);
   return draw_gl_input_;
 }