Simplify ScreenCapturer interface.

media/video/capture/screen/screen_capture_device_unittest.cc

 // Copyright (c) 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 "media/video/capture/screen/screen_capture_device.h"
 
 #include "base/basictypes.h"
 #include "base/sequenced_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/test/test_timeouts.h"
@@ skipping 49 matching lines @@
     frames_[1] = new ScreenCaptureData(
         buffer_.get(), kTestFrameWidth2 * ScreenCaptureData::kBytesPerPixel,
         SkISize::Make(kTestFrameWidth2, kTestFrameHeight2));
   }
   virtual ~FakeScreenCapturer() {}
 
   // VideoFrameCapturer interface.
   virtual void Start(Delegate* delegate) OVERRIDE {
     delegate_ = delegate;
   }
-  virtual void Stop() OVERRIDE {
-    delegate_ = NULL;
-  }
-  virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE {
-    NOTIMPLEMENTED();
-  }
   virtual void CaptureFrame() OVERRIDE {
     scoped_refptr<ScreenCaptureData> frame =
         frames_[frame_index_ % arraysize(frames_)];
     frame_index_++;
     delegate_->OnCaptureCompleted(frame);
   }
 
  private:
   Delegate* delegate_;
   scoped_ptr<uint8[]> buffer_;
@@ skipping 81 matching lines @@
   EXPECT_EQ(kTestFrameWidth1, caps.width);
   EXPECT_EQ(kTestFrameHeight1, caps.height);
   EXPECT_EQ(kFrameRate, caps.frame_rate);
   EXPECT_EQ(VideoCaptureCapability::kARGB, caps.color);
   EXPECT_FALSE(caps.interlaced);
 
   EXPECT_EQ(caps.width * caps.height * 4, frame_size);
 }
 
 }  // namespace media