Remove BrowserPlugin tests (only one test remaining with existing coverage)

content/renderer/browser_plugin/mock_browser_plugin_manager.cc

-// Copyright (c) 2012 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 "content/renderer/browser_plugin/mock_browser_plugin_manager.h"
-
-#include "base/message_loop/message_loop.h"
-#include "content/common/browser_plugin/browser_plugin_messages.h"
-#include "content/renderer/browser_plugin/mock_browser_plugin.h"
-#include "ipc/ipc_message.h"
-
-namespace content {
-
-MockBrowserPluginManager::MockBrowserPluginManager(
-    RenderViewImpl* render_view)
-    : BrowserPluginManager(render_view),
-      last_plugin_(NULL) {
-}
-
-MockBrowserPluginManager::~MockBrowserPluginManager() {
-}
-
-BrowserPlugin* MockBrowserPluginManager::CreateBrowserPlugin(
-    RenderViewImpl* render_view,
-    blink::WebFrame* frame,
-    scoped_ptr<BrowserPluginDelegate> delegate) {
-  last_plugin_ = new MockBrowserPlugin(render_view, frame, delegate.Pass());
-  return last_plugin_;
-}
-
-bool MockBrowserPluginManager::Send(IPC::Message* msg) {
-  // This is a copy-and-paste from MockRenderThread::Send.
-  // We need to simulate a synchronous channel, thus we are going to receive
-  // through this function messages, messages with reply and reply messages.
-  // We can only handle one synchronous message at a time.
-  if (msg->is_reply()) {
-    if (reply_deserializer_) {
-      reply_deserializer_->SerializeOutputParameters(*msg);
-      reply_deserializer_.reset();
-    }
-  } else {
-    if (msg->is_sync()) {
-      // We actually need to handle deleting the reply deserializer for sync
-      // messages.
-      reply_deserializer_.reset(
-          static_cast<IPC::SyncMessage*>(msg)->GetReplyDeserializer());
-    }
-    OnMessageReceived(*msg);
-  }
-  delete msg;
-  return true;
-}
-
-bool MockBrowserPluginManager::OnMessageReceived(
-    const IPC::Message& message) {
-  // Save the message in the sink.
-  sink_.OnMessageReceived(message);
-  return false;
-}
-
-}  // namespace content