Refactor ZLib and Verbatim encoders.

remoting/base/compressor_zlib.cc

Index: remoting/base/compressor_zlib.cc
diff --git a/remoting/base/compressor_zlib.cc b/remoting/base/compressor_zlib.cc
index 6f7007319685f87f04d89a5f79ea0b4244ba26ed..0128361a16699c0f0cb59131ac6ef9cad1e0b7a9 100644
--- a/remoting/base/compressor_zlib.cc
+++ b/remoting/base/compressor_zlib.cc
@@ -21,6 +21,17 @@
 namespace remoting {
 
 CompressorZlib::CompressorZlib() {
+  Reset();
+}
+
+CompressorZlib::~CompressorZlib() {
+  deflateEnd(stream_.get());
+}
+
+void CompressorZlib::Reset() {
+  if (stream_.get())
+    deflateEnd(stream_.get());
+
   stream_.reset(new z_stream());
 
   stream_->next_in = Z_NULL;
@@ -31,10 +42,6 @@ CompressorZlib::CompressorZlib() {
   deflateInit(stream_.get(), Z_BEST_SPEED);
 }
 
-CompressorZlib::~CompressorZlib() {
-  deflateEnd(stream_.get());
-}
-
 bool CompressorZlib::Process(const uint8* input_data, int input_size,
                              uint8* output_data, int output_size,
                              CompressorFlush flush, int* consumed,