Delete VCMEncodedFrame::VerifyAndAllocate

And mark EncodedImage::Allocate as deprecated.

Bug: webrtc:9378
Change-Id: I03ce907fa6b87803ddb72f548f60a9bf1b7c317d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/155163
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29383}

modules/video_coding/encoded_frame.h

@@ -110,16 +110,6 @@ class VCMEncodedFrame : protected EncodedImage {
     _codecSpecificInfo = *codec_specific;
   }
 
-  /**
-   * Verifies that current allocated buffer size is larger than or equal to the
-   * input size.
-   * If the current buffer size is smaller, a new allocation is made and the old
-   * buffer data
-   * is copied to the new buffer.
-   * Buffer size is updated to minimumSize.
-   */
-  void VerifyAndAllocate(size_t minimumSize);
-
  protected:
   void Reset();