Remove code that was only used by navigator.connect.

third_party/WebKit/public/platform/WebMessagePortChannelClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebMessagePortChannelClient_h
 #define WebMessagePortChannelClient_h
 
 #include "WebCommon.h"
-#include <v8.h>
 
 namespace blink {
 
 // Provides an interface for users of WebMessagePortChannel to be notified
 // when messages are available. This also gives users of WebMessagePortChannel
 // access to the V8 Context this message port lives in.

[kinuko, 2016/05/12 02:04:47]

nit: The second sentence seems now obsolete

 class BLINK_PLATFORM_EXPORT WebMessagePortChannelClient {
 public:
     // Alerts that new messages have arrived, which are retrieved by calling
     // WebMessagePortChannel::tryGetMessage. Note that this may be called
     // on any thread.
     virtual void messageAvailable() = 0;
 
-    // Returns the V8 isolate this message port lives in.
-    // Do not rely on this API, it is only exposed so content code can convert
-    // messages to base::Value, and will be removed when this conversion can be
-    // integrated into blink itself.
-    virtual v8::Isolate* scriptIsolate() = 0;
-
-    // Returns a V8 context messages sent to this port can be (de)serialized in.
-    // Can return null if no valid V8 context could be determined.
-    // Do not rely on this API, it is only exposed so content code can convert
-    // messages to base::Value, and will be removed when this conversion can be
-    // integrated into blink itself.
-    // FIXME: Remove this method when no longer needed (http://crbug.com/461906)
-    virtual v8::Local<v8::Context> scriptContextForMessageConversion() = 0;
-
 protected:
     ~WebMessagePortChannelClient() { }
 };
 
 } // namespace blink
 
 #endif