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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/browser_process_platform_part_aurawin.h"
      6 
      7 #include "base/command_line.h"
      8 #include "base/logging.h"
      9 #include "base/process/kill.h"
     10 #include "base/win/windows_version.h"
     11 #include "chrome/browser/browser_process.h"
     12 #include "chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.h"
     13 #include "chrome/common/chrome_switches.h"
     14 
     15 BrowserProcessPlatformPart::BrowserProcessPlatformPart() {
     16 }
     17 
     18 BrowserProcessPlatformPart::~BrowserProcessPlatformPart() {
     19 }
     20 
     21 void BrowserProcessPlatformPart::OnMetroViewerProcessTerminated() {
     22   metro_viewer_process_host_.reset(NULL);
     23 }
     24 
     25 void BrowserProcessPlatformPart::PlatformSpecificCommandLineProcessing(
     26     const CommandLine& command_line) {
     27   // Check for Windows 8 specific commandlines requesting that this process
     28   // either connect to an existing viewer or launch a new viewer and
     29   // synchronously wait for it to connect.
     30   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
     31     bool launch = command_line.HasSwitch(switches::kViewerLaunchViaAppId);
     32     bool connect = (launch ||
     33                     (command_line.HasSwitch(switches::kViewerConnect) &&
     34                      !metro_viewer_process_host_.get()));
     35     if (connect) {
     36       // Create a host to connect to the Metro viewer process over IPC.
     37       metro_viewer_process_host_.reset(new ChromeMetroViewerProcessHost());
     38       if (launch) {
     39         CHECK(metro_viewer_process_host_->LaunchViewerAndWaitForConnection(
     40             command_line.GetSwitchValueNative(
     41                 switches::kViewerLaunchViaAppId)));
     42       }
     43     }
     44   }
     45 }
     46 
     47 void BrowserProcessPlatformPart::AttemptExit() {
     48   // On WinAura, the regular exit path is fine except on Win8+, where Ash might
     49   // be active in Metro and won't go away even if all browsers are closed. The
     50   // viewer process, whose host holds a reference to g_browser_process, needs to
     51   // be killed as well.
     52   BrowserProcessPlatformPartBase::AttemptExit();
     53 
     54   if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
     55       metro_viewer_process_host_) {
     56     base::ProcessId viewer_id =
     57         metro_viewer_process_host_->GetViewerProcessId();
     58     if (viewer_id == base::kNullProcessId)
     59       return;
     60     // The viewer doesn't hold any state so it is fine to kill it before it
     61     // cleanly exits. This will trigger MetroViewerProcessHost::OnChannelError()
     62     // which will cleanup references to g_browser_process.
     63     bool success = base::KillProcessById(viewer_id, 0, true);
     64     DCHECK(success);
     65   }
     66 }
     67