Revert of Remove remote tree host and some related input and metro_driver code

chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc

Index: chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
diff --git a/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc b/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1c993f878d5459c7d415aef32db6cc47e95f10a3
--- /dev/null
+++ b/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
@@ -0,0 +1,174 @@
+// Copyright 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 "chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.h"
+
+#include "ash/display/display_info.h"
+#include "ash/display/display_manager.h"
+#include "ash/host/ash_remote_window_tree_host_win.h"
+#include "ash/shell.h"
+#include "ash/wm/window_positioner.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/strings/stringprintf.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/browser_process_platform_part_aurawin.h"
+#include "chrome/browser/browser_shutdown.h"
+#include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/search_engines/template_url_service_factory.h"
+#include "chrome/browser/ui/ash/ash_init.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_navigator.h"
+#include "chrome/browser/ui/browser_navigator_params.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/host_desktop.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/env_vars.h"
+#include "components/search_engines/util.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/gpu_data_manager.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/page_navigator.h"
+#include "content/public/browser/web_contents.h"
+#include "ui/aura/remote_window_tree_host_win.h"
+#include "ui/gfx/win/dpi.h"
+#include "ui/metro_viewer/metro_viewer_messages.h"
+#include "url/gurl.h"
+
+namespace {
+
+void CloseOpenAshBrowsers() {
+  BrowserList* browser_list =
+      BrowserList::GetInstance(chrome::HOST_DESKTOP_TYPE_ASH);
+  if (browser_list) {
+    for (BrowserList::const_iterator i = browser_list->begin();
+         i != browser_list->end(); ++i) {
+      Browser* browser = *i;
+      browser->window()->Close();
+      // If the attempt to Close the browser fails due to unload handlers on
+      // the page or in progress downloads, etc, destroy all tabs on the page.
+      while (browser->tab_strip_model()->count())
+        delete browser->tab_strip_model()->GetWebContentsAt(0);
+    }
+  }
+}
+
+void OpenURL(const GURL& url) {
+  chrome::NavigateParams params(
+      ProfileManager::GetActiveUserProfile(),
+      GURL(url),
+      ui::PAGE_TRANSITION_TYPED);
+  params.disposition = NEW_FOREGROUND_TAB;
+  params.host_desktop_type = chrome::HOST_DESKTOP_TYPE_ASH;
+  chrome::Navigate(&params);
+}
+
+}  // namespace
+
+ChromeMetroViewerProcessHost::ChromeMetroViewerProcessHost()
+    : MetroViewerProcessHost(
+          content::BrowserThread::GetMessageLoopProxyForThread(
+              content::BrowserThread::IO)) {
+  chrome::IncrementKeepAliveCount();
+}
+
+ChromeMetroViewerProcessHost::~ChromeMetroViewerProcessHost() {
+}
+
+void ChromeMetroViewerProcessHost::OnChannelError() {
+  // TODO(cpu): At some point we only close the browser. Right now this
+  // is very convenient for developing.
+  DVLOG(1) << "viewer channel error : Quitting browser";
+
+  // Unset environment variable to let breakpad know that metro process wasn't
+  // connected.
+  ::SetEnvironmentVariableA(env_vars::kMetroConnected, NULL);
+
+  // It seems possible that channel is connected, but ASH desktop is not yet
+  // created (instance is still NULL) and we receive channel error.
+  if (aura::RemoteWindowTreeHostWin::Instance()) {
+    aura::RemoteWindowTreeHostWin::Instance()->Disconnected();
+
+    chrome::DecrementKeepAliveCount();
+
+    // If browser is trying to quit, we shouldn't reenter the process.
+    // TODO(shrikant): In general there seem to be issues with how AttemptExit
+    // reentry works. In future release please clean up related code.
+    if (!browser_shutdown::IsTryingToQuit()) {
+      CloseOpenAshBrowsers();
+      chrome::CloseAsh();
+    }
+    // Tell the rest of Chrome about it.
+    content::NotificationService::current()->Notify(
+        chrome::NOTIFICATION_ASH_SESSION_ENDED,
+        content::NotificationService::AllSources(),
+        content::NotificationService::NoDetails());
+    return;
+  }
+
+  chrome::DecrementKeepAliveCount();
+
+  // This will delete the MetroViewerProcessHost object. Don't access member
+  // variables/functions after this call.
+  g_browser_process->platform_part()->OnMetroViewerProcessTerminated();
+}
+
+void ChromeMetroViewerProcessHost::OnChannelConnected(int32_t /*peer_pid*/) {
+  DVLOG(1) << "ChromeMetroViewerProcessHost::OnChannelConnected: ";
+  // Set environment variable to let breakpad know that metro process was
+  // connected.
+  ::SetEnvironmentVariableA(env_vars::kMetroConnected, "1");
+}
+
+void ChromeMetroViewerProcessHost::OnSetTargetSurface(
+    gfx::NativeViewId target_surface,
+    float device_scale) {
+  HWND hwnd = reinterpret_cast<HWND>(target_surface);
+
+  gfx::SetDefaultDeviceScaleFactor(device_scale);
+  chrome::OpenAsh(hwnd);
+  DCHECK(aura::RemoteWindowTreeHostWin::Instance());
+  DCHECK_EQ(hwnd, aura::RemoteWindowTreeHostWin::Instance()->remote_window());
+  ash::Shell::GetInstance()->CreateShelf();
+  ash::Shell::GetInstance()->ShowShelf();
+
+  // Tell our root window host that the viewer has connected.
+  aura::RemoteWindowTreeHostWin::Instance()->Connected(this);
+
+  // On Windows 8 ASH we default to SHOW_STATE_MAXIMIZED for the browser
+  // window. This is to ensure that we honor metro app conventions by default.
+  ash::WindowPositioner::SetMaximizeFirstWindow(true);
+  // Tell the rest of Chrome that Ash is running.
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_ASH_SESSION_STARTED,
+      content::NotificationService::AllSources(),
+      content::NotificationService::NoDetails());
+}
+
+void ChromeMetroViewerProcessHost::OnOpenURL(const base::string16& url) {
+  OpenURL(GURL(url));
+}
+
+void ChromeMetroViewerProcessHost::OnHandleSearchRequest(
+    const base::string16& search_string) {
+  GURL url(GetDefaultSearchURLForSearchTerms(
+      TemplateURLServiceFactory::GetForProfile(
+          ProfileManager::GetActiveUserProfile()), search_string));
+  if (url.is_valid())
+    OpenURL(url);
+}
+
+void ChromeMetroViewerProcessHost::OnWindowSizeChanged(uint32_t width,
+                                                       uint32_t height) {
+  std::vector<ash::DisplayInfo> info_list;
+  info_list.push_back(ash::DisplayInfo::CreateFromSpec(
+      base::StringPrintf("%dx%d*%f", width, height, gfx::GetDPIScale())));
+  ash::Shell::GetInstance()->display_manager()->OnNativeDisplaysChanged(
+      info_list);
+  aura::RemoteWindowTreeHostWin::Instance()->HandleWindowSizeChanged(width,
+                                                                     height);
+}