Extensions: Send the tab id to platform apps.

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 <list>
 #include <string>
 
@@ skipping 174 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_; }
+
  protected:
   friend struct ExtensionFunctionDeleteTraits;
 
   virtual ~ExtensionFunction();
 
   // Helper method for ExtensionFunctionDeleteTraits. Deletes this object.
   virtual void Destruct() const = 0;
 
   // Derived classes should implement this method to do their work and return
   // success/failure.
@@ skipping 52 matching lines @@
   // 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 callback to run once the function has done execution.
   ResponseCallback response_callback_;
 
+  // The ID of the tab triggered this function call, or -1 if there is no tab.
+  int source_tab_id_;
+
+ private:
   DISALLOW_COPY_AND_ASSIGN(ExtensionFunction);
 };
 
 // Extension functions that run on the UI thread. Most functions fall into
 // this category.
 class UIThreadExtensionFunction : public ExtensionFunction {
  public:
   // TODO(yzshen): We should be able to remove this interface now that we
   // support overriding the response callback.
   // A delegate for use in testing, to intercept the call to SendResponse.
@@ skipping 159 matching lines @@
  public:
   SyncIOThreadExtensionFunction();
 
   virtual void Run() OVERRIDE;
 
  protected:
   virtual ~SyncIOThreadExtensionFunction();
 };
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_