[inspector] fix BUILD.gn to use correct deps type

inspector target has header come from protocol_generated_sources in
sources. So protocol_generated_sources needs to be in public_deps.

Bug: chromium:931596
Change-Id: I3b5ea390e79549b48930b16819840e1a0f87304b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1506994
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60125}

src/inspector/BUILD.gn

@@ -82,12 +82,12 @@ v8_header_set("inspector_test_headers") {
 
 v8_source_set("inspector") {
   deps = [
-    ":protocol_generated_sources",
     "../..:v8_version",
   ]
 
   public_deps = [
     ":inspector_test_headers",
+    ":protocol_generated_sources",
     "../../:v8_libbase",
   ]