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

cc/output/software_renderer.cc

Index: cc/output/software_renderer.cc
diff --git a/cc/output/software_renderer.cc b/cc/output/software_renderer.cc
index 80a5f0e53ca2c46602d039c9f44ce74e326c5660..3381ab19e022390cd5fca50cfa9b126532cad17b 100644
--- a/cc/output/software_renderer.cc
+++ b/cc/output/software_renderer.cc
@@ -229,8 +229,7 @@ void SoftwareRenderer::PrepareSurfaceForPass(
   }
 }
 
-bool SoftwareRenderer::IsSoftwareResource(
-    ResourceProvider::ResourceId resource_id) const {
+bool SoftwareRenderer::IsSoftwareResource(ResourceId resource_id) const {
   switch (resource_provider_->GetResourceType(resource_id)) {
     case ResourceProvider::RESOURCE_TYPE_GL_TEXTURE:
       return false;