Provide TaskRunner to ContextCacheController

cc/test/test_context_provider.cc

 // Copyright 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 "cc/test/test_context_provider.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 66 matching lines @@
     : support_(std::move(support)),
       context3d_(std::move(context)),
       context_gl_(std::move(gl)),
       weak_ptr_factory_(this) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DCHECK(context3d_);
   DCHECK(context_gl_);
   context_thread_checker_.DetachFromThread();
   context_gl_->set_test_context(context3d_.get());
   context3d_->set_test_support(support_.get());
-  cache_controller_.reset(new ContextCacheController(support_.get()));
+  // Just pass nullptr to the ContextCacheController for its task runner. Idle
+  // handling is tested directly in ContextCacheController's unittests, and
+  // isn't needed here.
+  cache_controller_.reset(new ContextCacheController(support_.get(), nullptr));
 }
 
 TestContextProvider::~TestContextProvider() {
   DCHECK(main_thread_checker_.CalledOnValidThread() ||
          context_thread_checker_.CalledOnValidThread());
 }
 
 bool TestContextProvider::BindToCurrentThread() {
   // This is called on the thread the context will be used.
   DCHECK(context_thread_checker_.CalledOnValidThread());
@@ skipping 93 matching lines @@
 }
 
 void TestContextProvider::SetLostContextCallback(
     const LostContextCallback& cb) {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   DCHECK(lost_context_callback_.is_null() || cb.is_null());
   lost_context_callback_ = cb;
 }
 
 }  // namespace cc