Rename cc::ResourceProvider::ResourceId to cc::ResourceId and move it to its own file.

cc/output/delegating_renderer.cc

Index: cc/output/delegating_renderer.cc
diff --git a/cc/output/delegating_renderer.cc b/cc/output/delegating_renderer.cc
index 7906afa77e6f96470fd632b77afc861f27bf5856..5892838496a25d93c4eeab2be28e5ddb9dada592 100644
--- a/cc/output/delegating_renderer.cc
+++ b/cc/output/delegating_renderer.cc
@@ -66,9 +66,8 @@ const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
   return capabilities_;
 }
 
-static ResourceProvider::ResourceId AppendToArray(
-    ResourceProvider::ResourceIdArray* array,
-    ResourceProvider::ResourceId id) {
+static ResourceId AppendToArray(ResourceProvider::ResourceIdArray* array,
+                                ResourceId id) {
   array->push_back(id);
   return id;
 }