Simplify ScreenCapturer interface.

media/video/capture/screen/screen_capturer_fake.cc

 // Copyright (c) 2012 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_capturer_fake.h"
 
 #include "base/time.h"
 #include "media/video/capture/screen/screen_capture_data.h"
 
 namespace media {
@@ skipping 35 matching lines @@
     shared_buffers_[i] = delegate_->CreateSharedBuffer(buffer_size);
     if (shared_buffers_[i]) {
       buffers_[i] = reinterpret_cast<uint8*>(shared_buffers_[i]->ptr());
     } else {
       private_buffers_[i].reset(new uint8[buffer_size]);
       buffers_[i] = private_buffers_[i].get();
     }
   }
 }
 
-void ScreenCapturerFake::Stop() {
-}
-
-void ScreenCapturerFake::InvalidateRegion(const SkRegion& invalid_region) {
-  helper_.InvalidateRegion(invalid_region);
-}
-
 void ScreenCapturerFake::CaptureFrame() {
   base::Time capture_start_time = base::Time::Now();
 
   GenerateImage();
   helper_.InvalidateScreen(size_);
 
   SkRegion invalid_region;
   helper_.SwapInvalidRegion(&invalid_region);
 
   current_buffer_ = (current_buffer_ + 1) % kNumBuffers;
@@ skipping 44 matching lines @@
     row += bytes_per_row_;
   }
 }
 
 void ScreenCapturerFake::ScreenConfigurationChanged() {
   size_ = SkISize::Make(kWidth, kHeight);
   bytes_per_row_ = size_.width() * ScreenCaptureData::kBytesPerPixel;
 }
 
 }  // namespace media