Convert //cc from scoped_ptr to std::unique_ptr.

cc/test/test_context_provider.cc

Index: cc/test/test_context_provider.cc
diff --git a/cc/test/test_context_provider.cc b/cc/test/test_context_provider.cc
index fd67a99c0bff7a5c0951412ee939b61094890440..9ac2ba527cb451233585ad64b64e1a869cb739aa 100644
--- a/cc/test/test_context_provider.cc
+++ b/cc/test/test_context_provider.cc
@@ -40,14 +40,14 @@ scoped_refptr<TestContextProvider> TestContextProvider::CreateWorker() {
 
 // static
 scoped_refptr<TestContextProvider> TestContextProvider::Create(
-    scoped_ptr<TestWebGraphicsContext3D> context) {
+    std::unique_ptr<TestWebGraphicsContext3D> context) {
   if (!context)
     return NULL;
   return new TestContextProvider(std::move(context));
 }
 
 TestContextProvider::TestContextProvider(
-    scoped_ptr<TestWebGraphicsContext3D> context)
+    std::unique_ptr<TestWebGraphicsContext3D> context)
     : context3d_(std::move(context)),
       context_gl_(new TestGLES2Interface(context3d_.get())),
       bound_(false),