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

cc/layers/delegated_frame_provider_unittest.cc

Index: cc/layers/delegated_frame_provider_unittest.cc
diff --git a/cc/layers/delegated_frame_provider_unittest.cc b/cc/layers/delegated_frame_provider_unittest.cc
index fe8117e797a452d3bd30224434633f4101964d02..b54b9d4188dce5deabd36732d9731b4f5d4d03aa 100644
--- a/cc/layers/delegated_frame_provider_unittest.cc
+++ b/cc/layers/delegated_frame_provider_unittest.cc
@@ -35,15 +35,14 @@ class DelegatedFrameProviderTest
   }
 
   void AddTransferableResource(DelegatedFrameData* frame,
-                               ResourceProvider::ResourceId resource_id) {
+                               ResourceId resource_id) {
     TransferableResource resource;
     resource.id = resource_id;
     resource.mailbox_holder.texture_target = GL_TEXTURE_2D;
     frame->resource_list.push_back(resource);
   }
 
-  void AddTextureQuad(DelegatedFrameData* frame,
-                      ResourceProvider::ResourceId resource_id) {
+  void AddTextureQuad(DelegatedFrameData* frame, ResourceId resource_id) {
     SharedQuadState* sqs =
         frame->render_pass_list[0]->CreateAndAppendSharedQuadState();
     TextureDrawQuad* quad =