DevTools: Favor search results from the network

Files not from the filesystem, or not with green dots, are way more
likely to be relevant to the user.

Bug: 806225
Change-Id: I59e9727cf336299a459323a8357c3c242d965034
Reviewed-on: https://chromium-review.googlesource.com/c/1359468Reviewed-by: Erik Luo <luoe@chromium.org>
Commit-Queue: Joel Einbinder <einbinder@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613395}

third_party/blink/renderer/devtools/front_end/sources/SourcesSearchScope.js

@@ -52,6 +52,12 @@ Sources.SourcesSearchScope = class {
       return -1;
     if (!uiSourceCode1.isDirty() && uiSourceCode2.isDirty())
       return 1;
+    const isFileSystem1 = uiSourceCode1.project().type() === Workspace.projectTypes.FileSystem &&
+        !Persistence.persistence.binding(uiSourceCode1);
+    const isFileSystem2 = uiSourceCode2.project().type() === Workspace.projectTypes.FileSystem &&
+        !Persistence.persistence.binding(uiSourceCode2);
+    if (isFileSystem1 !== isFileSystem2)
+      return isFileSystem1 ? 1 : -1;
     const url1 = uiSourceCode1.url();
     const url2 = uiSourceCode2.url();
     if (url1 && !url2)