[inspector] Return error when paused in different context group

src/inspector/v8-debugger-agent-impl.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/inspector/v8-debugger-agent-impl.h"
 
 #include <algorithm>
 
 #include "src/debug/debug-interface.h"
 #include "src/inspector/injected-script.h"
@@ skipping 1017 matching lines @@
 V8DebuggerAgentImpl::currentAsyncStackTrace() {
   std::shared_ptr<AsyncStackTrace> asyncParent =
       m_debugger->currentAsyncParent();
   if (!asyncParent) return nullptr;
   return asyncParent->buildInspectorObject(
       m_debugger->currentAsyncCreation().get(),
       m_debugger->maxAsyncCallChainDepth() - 1);
 }
 
 bool V8DebuggerAgentImpl::isPaused() const {
-  // TODO(dgozman): this check allows once context group to resume the other,
-  // since they share debugger.
-  return m_debugger->isPaused();
+  return m_debugger->isPausedInContextGroup(m_session->contextGroupId());
 }
 
 void V8DebuggerAgentImpl::didParseSource(
     std::unique_ptr<V8DebuggerScript> script, bool success) {
   v8::HandleScope handles(m_isolate);
   String16 scriptSource = script->source();
   if (!success) script->setSourceURL(findSourceURL(scriptSource, false));
   if (!success)
     script->setSourceMappingURL(findSourceMapURL(scriptSource, false));
 
@@ skipping 232 matching lines @@
 
 void V8DebuggerAgentImpl::reset() {
   if (!enabled()) return;
   m_blackboxedPositions.clear();
   resetBlackboxedStateCache();
   m_scripts.clear();
   m_breakpointIdToDebuggerBreakpointIds.clear();
 }
 
 }  // namespace v8_inspector