Force full restore on next MakeVirtuallyCurrent

This CL is kept minimal to facilitate merge to M72 (and potentially
M71).

Details on comments 14 and 15 on https://crbug.com/910274

A more complete solution addressing SkiaRenderer,SkDDL will come when
issue 902904 is resolved.

Bug: 910274
Change-Id: Ie0f44443fa30a5ec87045bd138a3a8a08e17e35c
Reviewed-on: https://chromium-review.googlesource.com/c/1358799Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Jonathan Backer <backer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613173}

gpu/command_buffer/service/gr_cache_controller.cc

@@ -35,6 +35,7 @@ void GrCacheController::ScheduleGrContextCleanup() {
   // a long while even if it is under budget. Below we set a call back to
   // purge all possible GrContext resources if the context itself is not being
   // used.
+  context_state_->context->DirtyVirtualContextState();
   context_state_->need_context_state_reset = true;
   context_state_->gr_context->performDeferredCleanup(
       std::chrono::seconds(kOldResourceCleanupDelaySeconds));
@@ -69,6 +70,7 @@ void GrCacheController::PurgeGrCache(uint64_t idle_id) {
     return;
   }
 
+  context_state_->context->DirtyVirtualContextState();
   context_state_->need_context_state_reset = true;
   context_state_->gr_context->freeGpuResources();
 }

ui/gl/gl_context.cc

@@ -188,6 +188,10 @@ void GLContext::ForceReleaseVirtuallyCurrent() {
   NOTREACHED();
 }
 
+void GLContext::DirtyVirtualContextState() {
+  current_virtual_context_ = nullptr;
+}
+
 #if defined(OS_MACOSX)
 uint64_t GLContext::BackpressureFenceCreate() {
   return 0;

ui/gl/gl_context.h

@@ -194,6 +194,11 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
   // current.
   virtual void ForceReleaseVirtuallyCurrent();
 
+  // Indicates that some GL state was modified that was not tracked by virtual
+  // contexts. Forces full reset from unknown state the next time a virtual
+  // context is made current.
+  void DirtyVirtualContextState();
+
 #if defined(OS_MACOSX)
   // Create a fence for all work submitted to this context so far, and return a
   // monotonically increasing handle to it. This returned handle never needs to