Free worker context resources on idle.

cc/test/test_context_support.cc

Index: cc/test/test_context_support.cc
diff --git a/cc/test/test_context_support.cc b/cc/test/test_context_support.cc
index d3ec892fc5b48ad7ffe76a5044064de916039031..5153dcdf99d21caa4a1b0f3c09dc2b90dbe92b68 100644
--- a/cc/test/test_context_support.cc
+++ b/cc/test/test_context_support.cc
@@ -17,11 +17,13 @@ namespace cc {
 namespace {
 
 // Class that DCHECKs if it is destructed without first having Release called.
-class ScopedVisibilityImpl : public gpu::ContextSupport::ScopedVisibility {
+template <typename T>
+class ScopedContextSupportToken : public T {
  public:
-  explicit ScopedVisibilityImpl(gpu::ContextSupport* context_support)
+  explicit ScopedContextSupportToken(gpu::ContextSupport* context_support)
       : initial_context_support_(context_support) {}
-  ~ScopedVisibilityImpl() { DCHECK(!initial_context_support_); }
+
+  ~ScopedContextSupportToken() { DCHECK(!initial_context_support_); }
 
   void Release(gpu::ContextSupport* context_support) {
     DCHECK_EQ(initial_context_support_, context_support);
@@ -32,6 +34,11 @@ class ScopedVisibilityImpl : public gpu::ContextSupport::ScopedVisibility {
   const gpu::ContextSupport* initial_context_support_;
 };
 
+using ScopedVisibilityImpl =
+    ScopedContextSupportToken<gpu::ContextSupport::ScopedVisibility>;
+using ScopedBusyImpl =
+    ScopedContextSupportToken<gpu::ContextSupport::ScopedBusy>;
+
 }  // namespace
 
 TestContextSupport::TestContextSupport() : weak_ptr_factory_(this) {}
@@ -126,4 +133,15 @@ bool TestContextSupport::AnyClientsVisible() const {
   return num_visible_clients_ > 0;
 }
 
+std::unique_ptr<gpu::ContextSupport::ScopedBusy>
+TestContextSupport::ClientBecameBusy() {
+  return base::MakeUnique<ScopedBusyImpl>(this);
+}
+
+void TestContextSupport::ClientBecameNotBusy(std::unique_ptr<ScopedBusy> busy) {
+  static_cast<ScopedBusyImpl*>(busy.get())->Release(this);
+}
+
+void TestContextSupport::SetIdleCallback(const base::Closure& callback) {}
+
 }  // namespace cc