Revert "Adding GCM support to the copresence component. The Copresence server can push directives (…

components/copresence/handlers/gcm_handler.cc

Index: components/copresence/handlers/gcm_handler.cc
diff --git a/components/copresence/handlers/gcm_handler.cc b/components/copresence/handlers/gcm_handler.cc
deleted file mode 100644
index 023380bdd1b316070ebdd1d036ffd0028763413d..0000000000000000000000000000000000000000
--- a/components/copresence/handlers/gcm_handler.cc
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "components/copresence/handlers/gcm_handler.h"
-
-#include "base/base64.h"
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/strings/string_util.h"
-#include "components/copresence/handlers/directive_handler.h"
-#include "components/copresence/proto/push_message.pb.h"
-#include "components/gcm_driver/gcm_driver.h"
-
-using gcm::GCMClient;
-
-namespace {
-
-// TODO(ckehoe): Move this to a common library.
-bool Base64Decode(std::string data, std::string* out) {
-  // Convert from URL-safe.
-  base::ReplaceChars(data, "-", "+", &data);
-  base::ReplaceChars(data, "_", "/", &data);
-
-  // Add padding if needed.
-  while (data.size() % 4)
-    data.push_back('=');
-
-  // Decode.
-  return base::Base64Decode(data, out);
-}
-
-}  // namespace
-
-namespace copresence {
-
-const char GCMHandler::kCopresenceAppId[] =
-    "com.google.android.gms.location.copresence";
-const char GCMHandler::kCopresenceSenderId[] = "745476177629";
-const char GCMHandler::kGcmMessageKey[] = "PUSH_MESSAGE";
-
-
-// Public functions.
-
-GCMHandler::GCMHandler(gcm::GCMDriver* gcm_driver,
-                       DirectiveHandler* directive_handler)
-    : driver_(gcm_driver),
-      directive_handler_(directive_handler),
-      registration_callback_(base::Bind(&GCMHandler::RegistrationComplete,
-                                        AsWeakPtr())) {
-  DCHECK(driver_);
-  DCHECK(directive_handler_);
-
-  driver_->AddAppHandler(kCopresenceAppId, this);
-  driver_->Register(kCopresenceAppId,
-                    std::vector<std::string>(1, kCopresenceSenderId),
-                    registration_callback_);
-}
-
-GCMHandler::~GCMHandler() {
-  if (driver_)
-    driver_->RemoveAppHandler(kCopresenceAppId);
-}
-
-void GCMHandler::GetGcmId(const RegistrationCallback& callback) {
-  if (gcm_id_.empty()) {
-    pending_id_requests_.push_back(callback);
-  } else {
-    callback.Run(gcm_id_);
-  }
-}
-
-void GCMHandler::ShutdownHandler() {
-  // The GCMDriver is going away. Make sure we don't try to contact it.
-  driver_ = nullptr;
-}
-
-void GCMHandler::OnMessage(const std::string& app_id,
-                           const GCMClient::IncomingMessage& message) {
-  DCHECK_EQ(kCopresenceAppId, app_id);
-  DVLOG(2) << "Incoming GCM message";
-
-  const auto& content = message.data.find(kGcmMessageKey);
-  if (content == message.data.end()) {
-    LOG(ERROR) << "GCM message missing data key";
-    return;
-  }
-
-  std::string serialized_message;
-  if (!Base64Decode(content->second, &serialized_message)) {
-    LOG(ERROR) << "Couldn't decode GCM message";
-    return;
-  }
-
-  PushMessage push_message;
-  if (!push_message.ParseFromString(serialized_message)) {
-    LOG(ERROR) << "GCM message contained invalid proto";
-    return;
-  }
-
-  if (push_message.type() != PushMessage::REPORT) {
-    DVLOG(2) << "Discarding non-report GCM message";
-    return;
-  }
-
-  DVLOG(3) << "Processing " << push_message.report().directive_size()
-           << " directive(s) from GCM message";
-  for (const Directive& directive : push_message.report().directive())
-    directive_handler_->AddDirective(directive);
-
-  int message_count = push_message.report().subscribed_message_size();
-  LOG_IF(WARNING, message_count > 0)
-      << "Discarding " << message_count << " copresence messages sent via GCM";
-}
-
-void GCMHandler::OnMessagesDeleted(const std::string& app_id) {
-  DCHECK_EQ(kCopresenceAppId, app_id);
-  DVLOG(2) << "GCM message overflow reported";
-}
-
-void GCMHandler::OnSendError(
-    const std::string& /* app_id */,
-    const GCMClient::SendErrorDetails& /* send_error_details */) {
-  NOTREACHED() << "Copresence clients should not be sending GCM messages";
-}
-
-void GCMHandler::OnSendAcknowledged(const std::string& /* app_id */,
-                                    const std::string& /* message_id */) {
-  NOTREACHED() << "Copresence clients should not be sending GCM messages";
-}
-
-bool GCMHandler::CanHandle(const std::string& app_id) const {
-  return app_id == kCopresenceAppId;
-}
-
-
-// Private functions.
-
-void GCMHandler::RegistrationComplete(const std::string& registration_id,
-                                      GCMClient::Result result) {
-  if (result == GCMClient::SUCCESS) {
-    DVLOG(2) << "GCM registration successful. ID: " << registration_id;
-    gcm_id_ = registration_id;
-  } else {
-    LOG(ERROR) << "GCM registration failed with error " << result;
-  }
-
-  for (const RegistrationCallback& callback : pending_id_requests_) {
-    callback.Run(result == GCMClient::SUCCESS ?
-        registration_id : std::string());
-  }
-  pending_id_requests_.clear();
-}
-
-}  // namespace copresence