[DevTools] Remove V8InspectorSession::stateJSON().

https://chromium.googlesource.com/v8/v8.git/+/refs/heads/7.6-lkgr/include/v8-inspector.h
has the V8_DEPRECATED method.

And looks like
https://chromium.googlesource.com/v8/v8.git/+/refs/heads/7.7.1
has been cut, so this is no longer needed.

Change-Id: I9db414df4900fc24cd6789708464f9d90bfb64f2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1649344Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62102}

include/v8-inspector.h

@@ -130,10 +130,6 @@ class V8_EXPORT V8InspectorSession {
   // Dispatching protocol messages.
   static bool canDispatchMethod(const StringView& method);
   virtual void dispatchProtocolMessage(const StringView& message) = 0;
-  virtual V8_DEPRECATED("Use state() instead",
-                        std::unique_ptr<StringBuffer> stateJSON()) {
-    return nullptr;
-  }
   virtual std::vector<uint8_t> state() = 0;
   virtual std::vector<std::unique_ptr<protocol::Schema::API::Domain>>
   supportedDomains() = 0;

src/inspector/v8-inspector-session-impl.cc

@@ -365,14 +365,6 @@ void V8InspectorSessionImpl::dispatchProtocolMessage(
   }
 }
 
-std::unique_ptr<StringBuffer> V8InspectorSessionImpl::stateJSON() {
-  std::vector<uint8_t> json;
-  IPEStatus status = ConvertCBORToJSON(SpanFrom(state()), &json);
-  DCHECK(status.ok());
-  USE(status);
-  return v8::base::make_unique<BinaryStringBuffer>(std::move(json));
-}
-
 std::vector<uint8_t> V8InspectorSessionImpl::state() {
   std::vector<uint8_t> out;
   m_state->writeBinary(&out);

src/inspector/v8-inspector-session-impl.h

@@ -64,7 +64,6 @@ class V8InspectorSessionImpl : public V8InspectorSession,
 
   // V8InspectorSession implementation.
   void dispatchProtocolMessage(const StringView& message) override;
-  std::unique_ptr<StringBuffer> stateJSON() override;
   std::vector<uint8_t> state() override;
   std::vector<std::unique_ptr<protocol::Schema::API::Domain>> supportedDomains()
       override;