[inspector] Store interger in context embedder data instead of a string.

src/inspector/inspected-context.h

 // Copyright 2016 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.
 
 #ifndef V8_INSPECTOR_INSPECTEDCONTEXT_H_
 #define V8_INSPECTOR_INSPECTEDCONTEXT_H_
 
 #include "src/base/macros.h"
 #include "src/inspector/string-16.h"
 
 #include "include/v8.h"
 
 namespace v8_inspector {
 
 class InjectedScript;
 class InjectedScriptHost;
 class V8ContextInfo;
 class V8InspectorImpl;
 
 class InspectedContext {
  public:
   ~InspectedContext();
 
+  static int contextId(v8::Local<v8::Context>);
+
   v8::Local<v8::Context> context() const;
   int contextId() const { return m_contextId; }
   int contextGroupId() const { return m_contextGroupId; }
   String16 origin() const { return m_origin; }
   String16 humanReadableName() const { return m_humanReadableName; }
   String16 auxData() const { return m_auxData; }
 
   bool isReported() const { return m_reported; }
   void setReported(bool reported) { m_reported = reported; }
 
@@ skipping 18 matching lines @@
   bool m_reported;
   std::unique_ptr<InjectedScript> m_injectedScript;
   v8::Global<v8::Object> m_console;
 
   DISALLOW_COPY_AND_ASSIGN(InspectedContext);
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_INSPECTEDCONTEXT_H_