Remove all blimp browsertests.

blimp/engine/browser_tests/blimp_contents_view_readback_helper.cc

Index: blimp/engine/browser_tests/blimp_contents_view_readback_helper.cc
diff --git a/blimp/engine/browser_tests/blimp_contents_view_readback_helper.cc b/blimp/engine/browser_tests/blimp_contents_view_readback_helper.cc
deleted file mode 100644
index 051909e2b5fefdf5b6ad7e7c5e0fee7ef914f559..0000000000000000000000000000000000000000
--- a/blimp/engine/browser_tests/blimp_contents_view_readback_helper.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-// 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/engine/browser_tests/blimp_contents_view_readback_helper.h"
-
-#include "base/bind.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-
-namespace blimp {
-
-BlimpContentsViewReadbackHelper::BlimpContentsViewReadbackHelper()
-    : event_(base::WaitableEvent::ResetPolicy::MANUAL,
-             base::WaitableEvent::InitialState::NOT_SIGNALED),
-      weak_ptr_factory_(this) {}
-
-BlimpContentsViewReadbackHelper::~BlimpContentsViewReadbackHelper() = default;
-
-client::BlimpContentsView::ReadbackRequestCallback
-BlimpContentsViewReadbackHelper::GetCallback() {
-  return base::Bind(&BlimpContentsViewReadbackHelper::OnReadbackComplete,
-                    weak_ptr_factory_.GetWeakPtr());
-}
-
-SkBitmap* BlimpContentsViewReadbackHelper::GetBitmap() const {
-  return bitmap_.get();
-}
-
-void BlimpContentsViewReadbackHelper::OnReadbackComplete(
-    std::unique_ptr<SkBitmap> bitmap) {
-  bitmap_ = std::move(bitmap);
-  event_.Signal();
-}
-
-}  // namespace blimp