Remove all blimp client code.

blimp/client/core/feedback/blimp_feedback_data.cc

-// Copyright 2016 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 "blimp/client/core/feedback/blimp_feedback_data.h"
-
-#include "blimp/client/core/contents/blimp_contents_manager.h"
-
-namespace blimp {
-namespace client {
-const char kFeedbackSupportedKey[] = "Blimp Supported";
-const char kFeedbackHasVisibleBlimpContents[] = "Blimp Visible";
-const char kFeedbackUserNameKey[] = "Blimp Account";
-
-namespace {
-std::string HasVisibleBlimpContents(
-    BlimpContentsManager* blimp_contents_manager) {
-  std::vector<BlimpContentsImpl*> all_blimp_contents =
-      blimp_contents_manager->GetAllActiveBlimpContents();
-  for (const auto& item : all_blimp_contents) {
-    if (item->document_manager()->visible()) {
-      return "true";
-    }
-  }
-  return "false";
-}
-}  // namespace
-
-std::unordered_map<std::string, std::string> CreateBlimpFeedbackData(
-    BlimpContentsManager* blimp_contents_manager,
-    const std::string& username) {
-  std::unordered_map<std::string, std::string> data;
-  data.insert(std::make_pair(kFeedbackSupportedKey, "true"));
-  data.insert(std::make_pair(kFeedbackHasVisibleBlimpContents,
-                             HasVisibleBlimpContents(blimp_contents_manager)));
-  data.insert(std::make_pair(kFeedbackUserNameKey, username));
-  return data;
-}
-
-}  // namespace client
-}  // namespace blimp