[Extensions] Remove the source_tab_id property on API request messages

extensions/browser/extension_function.h

 // Copyright 2013 The Chromium 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 EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
 #define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 278 matching lines @@
   void set_histogram_value(
       extensions::functions::HistogramValue histogram_value) {
     histogram_value_ = histogram_value; }
   extensions::functions::HistogramValue histogram_value() const {
     return histogram_value_; }
 
   void set_response_callback(const ResponseCallback& callback) {
     response_callback_ = callback;
   }
 
-  void set_source_tab_id(int source_tab_id) { source_tab_id_ = source_tab_id; }
-  int source_tab_id() const { return source_tab_id_; }
-
   void set_source_context_type(extensions::Feature::Context type) {
     source_context_type_ = type;
   }
   extensions::Feature::Context source_context_type() const {
     return source_context_type_;
   }
 
   void set_source_process_id(int source_process_id) {
     source_process_id_ = source_process_id;
   }
@@ skipping 146 matching lines @@
   bool user_gesture_;
 
   // Any class that gets a malformed message should set this to true before
   // returning.  Usually we want to kill the message sending process.
   bool bad_message_;
 
   // The sample value to record with the histogram API when the function
   // is invoked.
   extensions::functions::HistogramValue histogram_value_;
 
-  // The ID of the tab triggered this function call, or -1 if there is no tab.
-  int source_tab_id_;
-
   // The type of the JavaScript context where this call originated.
   extensions::Feature::Context source_context_type_;
 
   // The process ID of the page that triggered this function call, or -1
   // if unknown.
   int source_process_id_;
 
   // The response type of the function, if the response has been sent.
   std::unique_ptr<ResponseType> response_type_;
 
@@ skipping 196 matching lines @@
  private:
   // If you're hitting a compile error here due to "final" - great! You're
   // doing the right thing, you just need to extend UIThreadExtensionFunction
   // instead of AsyncExtensionFunction.
   ResponseAction Run() final;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncExtensionFunction);
 };
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_