Add ContextProvider::InvalidateGrContext to reset GL state in GrContext

ui/compositor/test/in_process_context_provider.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/compositor/test/in_process_context_provider.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/lazy_instance.h"
 #include "base/strings/stringprintf.h"
@@ skipping 147 matching lines @@
       skia::AdoptRef(skia_bindings::CreateCommandBufferSkiaGLBinding());
   interface->fCallback = BindGrContextCallback;
   interface->fCallbackData = reinterpret_cast<GrGLInterfaceCallbackData>(this);
 
   gr_context_ = skia::AdoptRef(GrContext::Create(
       kOpenGL_GrBackend, reinterpret_cast<GrBackendContext>(interface.get())));
 
   return gr_context_.get();
 }
 
+void InProcessContextProvider::InvalidateGrContext(uint32_t state) {
+  DCHECK(context_thread_checker_.CalledOnValidThread());
+
+  if (gr_context_)
+    gr_context_.get()->resetContext(state);
+}
+
 void InProcessContextProvider::SetupLock() {
 }
 
 base::Lock* InProcessContextProvider::GetLock() {
   return &context_lock_;
 }
 
 bool InProcessContextProvider::IsContextLost() {
   DCHECK(context_thread_checker_.CalledOnValidThread());
 
@@ skipping 39 matching lines @@
       return;
     destroyed_ = true;
   }
   if (!lost_context_callback_.is_null())
     base::ResetAndReturn(&lost_context_callback_).Run();
   if (gr_context_)
     gr_context_->abandonContext();
 }
 
 }  // namespace ui