Update cronet_bindings_generator.py to use correct mojom location.

Mojom was moved in https://crrev.com/c/2098849 but cronet wasn't
updated.

Updated generated C bindings to match cronet.idl with default-enabled quic.

Bug: 1060467
Change-Id: I9a87a73d4f6001d57f5846daa30ca3763c82a2b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2495906Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: David Schinazi <dschinazi@chromium.org>
Commit-Queue: Misha Efimov <mef@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820565}

components/cronet/native/generated/cronet.idl_impl_struct.h

@@ -79,7 +79,7 @@ struct Cronet_EngineParams {
   std::string user_agent;
   std::string accept_language;
   std::string storage_path;
-  bool enable_quic = false;
+  bool enable_quic = true;
   bool enable_http2 = true;
   bool enable_brotli = true;
   Cronet_EngineParams_HTTP_CACHE_MODE http_cache_mode =

components/cronet/tools/generators/cronet_bindings_generator.py

@@ -34,7 +34,7 @@ if "--use_bundled_pylibs" in sys.argv[1:]:
   sys.path.insert(0, os.path.join(_GetDirAbove("components"), "third_party"))
 
 sys.path.insert(0, os.path.join(_GetDirAbove("components"),
-                                "mojo", "public", "tools", "bindings", "pylib"))
+                                "mojo", "public", "tools", "mojom"))
 
 # pylint: disable=wrong-import-position
 from mojom.error import Error