Remove DesktopRegion parameter from DesktopCapturer::Capture

webrtc/modules/desktop_capture/desktop_capturer.h

Index: webrtc/modules/desktop_capture/desktop_capturer.h
diff --git a/webrtc/modules/desktop_capture/desktop_capturer.h b/webrtc/modules/desktop_capture/desktop_capturer.h
index 0c7b68e85d8ec9fd0502c9bb469c9efaf6095575..d758946b843d1451189f053b8bf642e2adc5867f 100644
--- a/webrtc/modules/desktop_capture/desktop_capturer.h
+++ b/webrtc/modules/desktop_capture/desktop_capturer.h
@@ -31,11 +31,11 @@ class DesktopCapturer {
     SUCCESS,
 
     // There was a temporary error. The caller should continue calling
-    // Capture(), in the expectation that it will eventually recover.
+    // CaptureFrame(), in the expectation that it will eventually recover.
     ERROR_TEMPORARY,
 
     // Capture has failed and will keep failing if the caller tries calling
-    // Capture() again.
+    // CaptureFrame() again.
     ERROR_PERMANENT,
 
     MAX_VALUE = ERROR_PERMANENT
@@ -61,17 +61,15 @@ class DesktopCapturer {
 
   // Sets SharedMemoryFactory that will be used to create buffers for the
   // captured frames. The factory can be invoked on a thread other than the one
-  // where Capture() is called. It will be destroyed on the same thread. Shared
-  // memory is currently supported only by some DesktopCapturer implementations.
+  // where CaptureFrame() is called. It will be destroyed on the same thread.
+  // Shared memory is currently supported only by some DesktopCapturer
+  // implementations.
   virtual void SetSharedMemoryFactory(
       std::unique_ptr<SharedMemoryFactory> shared_memory_factory) {}
 
-  // This is a legacy interface, consumers should call CaptureFrame() function.
-  virtual void Capture(const DesktopRegion& region) { CaptureFrame(); }
-
   // Captures next frame, and involve callback provided by Start() function.
   // Pending capture requests are canceled when DesktopCapturer is deleted.
-  virtual void CaptureFrame() { Capture(DesktopRegion()); }
+  virtual void CaptureFrame() = 0;
 
   // Sets the window to be excluded from the captured image in the future
   // Capture calls. Used to exclude the screenshare notification window for