cc: Implement shared worker contexts. (v1)

mojo/cc/context_provider_mojo.cc

Index: mojo/cc/context_provider_mojo.cc
diff --git a/mojo/cc/context_provider_mojo.cc b/mojo/cc/context_provider_mojo.cc
index 801d9f5e478b0322c8863a47a86390e906ef7473..610d506d94be07613754f138e6f22164f3200ec4 100644
--- a/mojo/cc/context_provider_mojo.cc
+++ b/mojo/cc/context_provider_mojo.cc
@@ -57,7 +57,13 @@ base::Lock* ContextProviderMojo::GetLock() {
   return &context_lock_;
 }
 
-bool ContextProviderMojo::DestroyedOnMainThread() { return !context_; }
+bool ContextProviderMojo::HasBeenLostOnMainThread() {
+  return !context_;
+}
+
+bool ContextProviderMojo::HasBeenDestroyed() {
+  return !context_;
+}
 
 ContextProviderMojo::~ContextProviderMojo() {
   context_gl_.reset();