Implement all resolution change policies for desktop and tab capture.

content/browser/media/capture/content_video_capture_device_core.h

Index: content/browser/media/capture/content_video_capture_device_core.h
diff --git a/content/browser/media/capture/content_video_capture_device_core.h b/content/browser/media/capture/content_video_capture_device_core.h
index f477a157439a33aa845cc0758008cc099a49163b..67dffd6ae65a9e71164d3c0849a0d603907a8975 100644
--- a/content/browser/media/capture/content_video_capture_device_core.h
+++ b/content/browser/media/capture/content_video_capture_device_core.h
@@ -11,6 +11,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
+#include "content/browser/media/capture/capture_resolution_chooser.h"
 #include "content/browser/media/capture/video_capture_oracle.h"
 #include "content/common/content_export.h"
 #include "media/base/video_frame.h"
@@ -23,15 +24,6 @@ class VideoFrame;
 
 namespace content {
 
-const int kMinFrameWidth = 2;
-const int kMinFrameHeight = 2;
-
-// Returns the nearest even integer closer to zero.
-template<typename IntType>
-IntType MakeEven(IntType x) {
-  return x & static_cast<IntType>(-2);
-}
-
 class VideoCaptureMachine;
 
 // Thread-safe, refcounted proxy to the VideoCaptureOracle.  This proxy wraps
@@ -104,8 +96,8 @@ class ThreadSafeCaptureOracle
   // The video capture parameters used to construct the oracle proxy.
   const media::VideoCaptureParams params_;
 
-  // The current video capture size.
-  gfx::Size capture_size_;
+  // Determines video capture frame sizes.
+  CaptureResolutionChooser resolution_chooser_;
 };
 
 // Keeps track of the video capture source frames and executes copying on the