Add SetClient method implementation to InterfaceImpl.

mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc

 // 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.
 
 #include "mojo/public/cpp/bindings/error_handler.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/public/interfaces/bindings/tests/math_calculator.mojom.h"
 #include "mojo/public/interfaces/bindings/tests/sample_service.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 21 matching lines @@
  public:
   virtual ~MathCalculatorImpl() {}
 
   MathCalculatorImpl() : total_(0.0) {
   }
 
   virtual void OnConnectionError() MOJO_OVERRIDE {
     delete this;
   }
 
-  virtual void SetClient(math::CalculatorUI* ui) MOJO_OVERRIDE {
-    ui_ = ui;
-  }
-
   virtual void Clear() MOJO_OVERRIDE {
-    ui_->Output(total_);
+    client()->Output(total_);
   }
 
   virtual void Add(double value) MOJO_OVERRIDE {
     total_ += value;
-    ui_->Output(total_);
+    client()->Output(total_);
   }
 
   virtual void Multiply(double value) MOJO_OVERRIDE {
     total_ *= value;
-    ui_->Output(total_);
+    client()->Output(total_);
   }
 
  private:
-  math::CalculatorUI* ui_;
   double total_;
 };
 
 class MathCalculatorUIImpl : public math::CalculatorUI {
  public:
   explicit MathCalculatorUIImpl(math::CalculatorPtr calculator)
       : calculator_(calculator.Pass()),
         output_(0.0) {
     calculator_->SetClient(this);
   }
@@ skipping 162 matching lines @@
   // This is a test to ensure the following compiles. The sample::Port interface
   // does not have an explicit Client attribute.
   sample::PortPtr port;
   MessagePipe pipe;
   port.Bind(pipe.handle0.Pass());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo