fix: correct electron gin embedder indices (33-x-y) (#46003)

fix: correct electron gin embedder indices (#45389)

fix: correct gin embedder indices.

Move electron extra embedders to the end of the enum so they do not
interfere with chromium embedders indices.
Also use kEmbedderBlinkTag directly in its index calculation without
adding extra indices from other tags.

Co-authored-by: marekharanczyk <[email protected]>

patches/chromium/fix_harden_blink_scriptstate_maybefrom.patch

@@ -40,18 +40,18 @@ accessing uninitialized lower indexes can return garbage values that cannot be n
 Refer to v8::EmbedderDataSlot::store_aligned_pointer for context.
 
 diff --git a/gin/public/gin_embedders.h b/gin/public/gin_embedders.h
-index 8d7c5631fd8f1499c67384286f0e3c4037673b32..99b2e2f63be8a46c5546dd53bc9b05e8c54e857c 100644
+index 8d7c5631fd8f1499c67384286f0e3c4037673b32..2b7bdfbac06a42e6bc51eb65e023c3673e6eb885 100644
 --- a/gin/public/gin_embedders.h
 +++ b/gin/public/gin_embedders.h
-@@ -18,6 +18,8 @@ namespace gin {
- enum GinEmbedder : uint16_t {
-   kEmbedderNativeGin,
+@@ -20,6 +20,8 @@ enum GinEmbedder : uint16_t {
    kEmbedderBlink,
-+  kEmbedderElectron,
-+  kEmbedderBlinkTag,
    kEmbedderPDFium,
    kEmbedderFuchsia,
++  kEmbedderElectron,
++  kEmbedderBlinkTag,
  };
+
+ }  // namespace gin
 diff --git a/third_party/blink/renderer/platform/bindings/script_state.cc b/third_party/blink/renderer/platform/bindings/script_state.cc
 index e4a27a24c83dd1a478b2ada8b6c8220076790791..c76dc818f38a62fff63852dbecbc85e304ac731d 100644
 --- a/third_party/blink/renderer/platform/bindings/script_state.cc
@@ -86,7 +86,7 @@ index e4a27a24c83dd1a478b2ada8b6c8220076790791..c76dc818f38a62fff63852dbecbc85e3
  
    // Cut the reference from ScriptState to V8 context.
 diff --git a/third_party/blink/renderer/platform/bindings/script_state.h b/third_party/blink/renderer/platform/bindings/script_state.h
-index e9b16a9c71b9631222d0745428fea06be2e74472..aba4d930a9a45fb43e0aaac26af7df4fa07fc447 100644
+index e9b16a9c71b9631222d0745428fea06be2e74472..a85431a73bae23b5d47bc0338430c120de538864 100644
 --- a/third_party/blink/renderer/platform/bindings/script_state.h
 +++ b/third_party/blink/renderer/platform/bindings/script_state.h
 @@ -184,7 +184,12 @@ class PLATFORM_EXPORT ScriptState : public GarbageCollected<ScriptState> {
@@ -103,7 +103,7 @@ index e9b16a9c71b9631222d0745428fea06be2e74472..aba4d930a9a45fb43e0aaac26af7df4f
        return nullptr;
      }
      ScriptState* script_state =
-@@ -251,9 +256,15 @@ class PLATFORM_EXPORT ScriptState : public GarbageCollected<ScriptState> {
+@@ -251,9 +256,14 @@ class PLATFORM_EXPORT ScriptState : public GarbageCollected<ScriptState> {
    static void SetCreateCallback(CreateCallback);
    friend class ScriptStateImpl;
  
@@ -114,7 +114,6 @@ index e9b16a9c71b9631222d0745428fea06be2e74472..aba4d930a9a45fb43e0aaac26af7df4f
        static_cast<int>(gin::kEmbedderBlink);
 +  static constexpr int kV8ContextPerContextDataTagIndex =
 +      static_cast<int>(gin::kPerContextDataStartIndex) +
-+      static_cast<int>(gin::kEmbedderBlink) +
 +      static_cast<int>(gin::kEmbedderBlinkTag);
  };