cc: Split Proxy and TaskRunnerProvider for the LayerTreeHost

cc/test/layer_tree_test.h

Index: cc/test/layer_tree_test.h
diff --git a/cc/test/layer_tree_test.h b/cc/test/layer_tree_test.h
index 33593aae97bdcb855cac031f381eaf2cfbb43a93..a26d738f796212d8ee31e40661d88771c60730aa 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -253,9 +253,10 @@ class LayerTreeTest : public testing::Test, public TestHooks {
 
   bool HasImplThread() { return !!impl_thread_; }
   base::SingleThreadTaskRunner* ImplThreadTaskRunner() {
-    DCHECK(proxy());
-    return proxy()->ImplThreadTaskRunner() ? proxy()->ImplThreadTaskRunner()
-                                           : main_task_runner_.get();
+    DCHECK(task_runner_provider());
+    return task_runner_provider()->ImplThreadTaskRunner()

[vmpstr, 2015/11/10 21:59:34]

save it into a temporary impl_thread_task_runner, since you're accessing it
twice otherwise.

[Khushal, 2015/11/10 23:34:03]

Done.

+               ? task_runner_provider()->ImplThreadTaskRunner()
+               : main_task_runner_.get();
   }
   base::SingleThreadTaskRunner* MainThreadTaskRunner() {
     return main_task_runner_.get();
@@ -263,6 +264,10 @@ class LayerTreeTest : public testing::Test, public TestHooks {
   Proxy* proxy() const {
     return layer_tree_host_ ? layer_tree_host_->proxy() : NULL;
   }
+  TaskRunnerProvider* task_runner_provider() const {
+    return layer_tree_host_ ? layer_tree_host_->task_runner_provider()
+                            : nullptr;
+  }
   TaskGraphRunner* task_graph_runner() const {
     return task_graph_runner_.get();
   }