net: Remove deprecated IOBuffer constructor.

Bug: 488553
Change-Id: I8e138d56c3cf3216997c070ed1545256262ad8a6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2371603
Auto-Submit: Victor Costan <pwnall@chromium.org>
Commit-Queue: Eric Roman <eroman@chromium.org>
Reviewed-by: Eric Roman <eroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801809}

net/base/io_buffer.cc

@@ -24,11 +24,6 @@ void IOBuffer::AssertValidBufferSize(int size) {
 
 IOBuffer::IOBuffer() : data_(nullptr) {}
 
-IOBuffer::IOBuffer(int buffer_size) {
-  AssertValidBufferSize(buffer_size);
-  data_ = new char[buffer_size];
-}
-
 IOBuffer::IOBuffer(size_t buffer_size) {
   AssertValidBufferSize(buffer_size);
   data_ = new char[buffer_size];

net/base/io_buffer.h

@@ -77,8 +77,6 @@ class NET_EXPORT IOBuffer : public base::RefCountedThreadSafe<IOBuffer> {
  public:
   IOBuffer();
 
-  // TODO(eroman): Deprecated. Use the size_t flavor instead. crbug.com/488553
-  explicit IOBuffer(int buffer_size);
   explicit IOBuffer(size_t buffer_size);
 
   char* data() const { return data_; }