Move chromium-specific files from leveldb to chromium.

third_party/leveldatabase/port/port_chromium.cc

+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include "port/port_chromium.h"
+
+#include "util/logging.h"
+
+#if defined(USE_SNAPPY)
+#  include "third_party/snappy/src/snappy.h"
+#endif
+
+namespace leveldb {
+namespace port {
+
+Mutex::Mutex() {
+}
+
+Mutex::~Mutex() {
+}
+
+void Mutex::Lock() {
+  mu_.Acquire();
+}
+
+void Mutex::Unlock() {
+  mu_.Release();
+}
+
+void Mutex::AssertHeld() {
+  mu_.AssertAcquired();
+}
+
+CondVar::CondVar(Mutex* mu)
+    : cv_(&mu->mu_) {
+}
+
+CondVar::~CondVar() { }
+
+void CondVar::Wait() {
+  cv_.Wait();
+}
+
+void CondVar::Signal(){
+  cv_.Signal();
+}
+
+void CondVar::SignalAll() {
+  cv_.Broadcast();
+}
+
+bool Snappy_Compress(const char* input, size_t input_length,
+                     std::string* output) {
+#if defined(USE_SNAPPY)
+  output->resize(snappy::MaxCompressedLength(input_length));
+  size_t outlen;
+  snappy::RawCompress(input, input_length, &(*output)[0], &outlen);
+  output->resize(outlen);
+  return true;
+#else
+  return false;
+#endif
+}
+
+bool Snappy_GetUncompressedLength(const char* input, size_t length,
+                                  size_t* result) {
+#if defined(USE_SNAPPY)
+  return snappy::GetUncompressedLength(input_data, input_length, result);
+#else
+  return false;
+#endif
+}
+
+bool Snappy_Uncompress(const char* input_data, size_t input_length,
+                       char* output) {
+#if defined(USE_SNAPPY)
+  return snappy::RawUncompress(input_data, input_length, output);
+#else
+  return false;
+#endif
+}
+
+}
+}