Remove old WebSourceBufferImpl::append()

This is the third part of a three-sided MediaSource
Chromium/Blink+roll Blink/Chromium set of changes to enable
JavaScript web apps to continue to round-trip
SourceBuffer.timestampOffset set/get if SourceBuffer append
operations do not update the timestamp offset, and to
retrieve any updated timestamp offset as can occur during
upcoming "sequence" append mode compliant coded frame
processing.

This change removes the obsolete Chromium
WebSourceBufferImpl::append(,) now that Blink
WebSourceBuffer.h only has append(,,double*).

R=acolwell@chromium.org
BUG=249422
TEST=All media_unittests and http/tests/media/media-source layout tests pass locally on Linux

Review URL: https://codereview.chromium.org/183933002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255373 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/media/websourcebuffer_impl.cc

@@ -61,10 +61,6 @@ blink::WebTimeRanges WebSourceBufferImpl::buffered() {
   return result;
 }
 
-void WebSourceBufferImpl::append(const unsigned char* data, unsigned length) {
-  append(data, length, NULL);
-}
-
 void WebSourceBufferImpl::append(
     const unsigned char* data,
     unsigned length,

content/renderer/media/websourcebuffer_impl.h

@@ -25,9 +25,6 @@ class WebSourceBufferImpl : public blink::WebSourceBuffer {
   // blink::WebSourceBuffer implementation.
   virtual bool setMode(AppendMode mode);
   virtual blink::WebTimeRanges buffered();
-  virtual void append(const unsigned char* data, unsigned length);
-  // TODO(wolenetz): Remove the append(), above, and its implementation once the
-  // following append() signature is used by Blink. See http://crbug.com/249422.
   virtual void append(
       const unsigned char* data,
       unsigned length,