Chrome metro mode win7 emulation.

win8/metro_driver/metro_driver.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 "stdafx.h"
 #include "win8/metro_driver/metro_driver.h"
 
 #include <roerrorapi.h>
 #include <shobjidl.h>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/logging_win.h"
 #include "base/win/scoped_comptr.h"
+#include "base/win/windows_version.h"
 #include "win8/metro_driver/winrt_utils.h"
 
-// TODO(siggi): Move this to GYP.
-#pragma comment(lib, "runtimeobject.lib")
-
 namespace {
 
 LONG WINAPI ErrorReportingHandler(EXCEPTION_POINTERS* ex_info) {
   // See roerrorapi.h for a description of the
   // exception codes and parameters.
   DWORD code = ex_info->ExceptionRecord->ExceptionCode;
   ULONG_PTR* info = ex_info->ExceptionRecord->ExceptionInformation;
   if (code == EXCEPTION_RO_ORIGINATEERROR) {
     base::string16 msg(reinterpret_cast<wchar_t*>(info[2]), info[1]);
     LOG(ERROR) << "VEH: Metro error 0x" << std::hex << info[0] << ": " << msg;
   } else if (code == EXCEPTION_RO_TRANSFORMERROR) {
     base::string16 msg(reinterpret_cast<wchar_t*>(info[3]), info[2]);
     LOG(ERROR) << "VEH: Metro old error 0x" << std::hex << info[0]
                << " new error 0x" << info[1] << ": " << msg;
   }
 
   return EXCEPTION_CONTINUE_SEARCH;
 }
 
+void SetMetroReportingFlags() {
+#if !defined(NDEBUG)
+  // Set the error reporting flags to always raise an exception,
+  // which is then processed by our vectored exception handling
+  // above to log the error message.
+  winfoundtn::Diagnostics::SetErrorReportingFlags(
+      winfoundtn::Diagnostics::UseSetErrorInfo |
+      winfoundtn::Diagnostics::ForceExceptions);
+#endif
+}
+
 // TODO(robertshield): This GUID is hard-coded in a bunch of places that
 //     don't allow explicit includes. Find a single place for it to live.
 // {7FE69228-633E-4f06-80C1-527FEA23E3A7}
 const GUID kChromeTraceProviderName = {
     0x7fe69228, 0x633e, 0x4f06,
         { 0x80, 0xc1, 0x52, 0x7f, 0xea, 0x23, 0xe3, 0xa7 } };
 
-}
+}  // namespace
 
 #if !defined(COMPONENT_BUILD)
 // Required for base initialization.
 // TODO(siggi): This should be handled better, as this way our at exit
 //     registrations will run under the loader's lock. However,
 //     once metro_driver is merged into Chrome.dll, this will go away anyhow.
 base::AtExitManager at_exit;
 #endif
 
+mswr::ComPtr<winapp::Core::ICoreApplication> InitWindows8() {
+  SetMetroReportingFlags();
+  HRESULT hr = ::Windows::Foundation::Initialize(RO_INIT_MULTITHREADED);
+  if (FAILED(hr))
+    CHECK(false);
+  mswr::ComPtr<winapp::Core::ICoreApplication> core_app;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_ApplicationModel_Core_CoreApplication,
+      core_app.GetAddressOf());
+  if (FAILED(hr))
+    CHECK(false);
+  return core_app;
+}
+
+mswr::ComPtr<winapp::Core::ICoreApplication> InitWindows7();
+
 extern "C" __declspec(dllexport)
 int InitMetro() {
+  // Metro mode or its emulation is not supported in Vista or XP.
+  if (base::win::GetVersion() < base::win::VERSION_WIN7)
+    return 1;
   // Initialize the command line.
   CommandLine::Init(0, NULL);
+  // Initialize the logging system.
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   logging::InitLogging(settings);
-
 #if defined(NDEBUG)
   logging::SetMinLogLevel(logging::LOG_ERROR);
 #else
   logging::SetMinLogLevel(logging::LOG_VERBOSE);
-  // Set the error reporting flags to always raise an exception,
-  // which is then processed by our vectored exception handling
-  // above to log the error message.
-  winfoundtn::Diagnostics::SetErrorReportingFlags(
-      winfoundtn::Diagnostics::UseSetErrorInfo |
-      winfoundtn::Diagnostics::ForceExceptions);
-
-  HANDLE registration =
+    HANDLE registration =
       ::AddVectoredExceptionHandler(TRUE, ErrorReportingHandler);
 #endif
-
   // Enable trace control and transport through event tracing for Windows.
   logging::LogEventProvider::Initialize(kChromeTraceProviderName);
-
   DVLOG(1) << "InitMetro";
 
-  mswrw::RoInitializeWrapper ro_initializer(RO_INIT_MULTITHREADED);
-  CheckHR(ro_initializer, "RoInitialize failed");
-
+  // OS specific initialization.
   mswr::ComPtr<winapp::Core::ICoreApplication> core_app;
-  HRESULT hr = winrt_utils::CreateActivationFactory(
-      RuntimeClass_Windows_ApplicationModel_Core_CoreApplication,
-      core_app.GetAddressOf());
-  CheckHR(hr, "Failed to create app factory");
-  if (FAILED(hr))
-    return 1;
+  if (base::win::GetVersion() < base::win::VERSION_WIN8)
+    core_app = InitWindows7();
+  else
+    core_app = InitWindows8();
 
   auto view_factory = mswr::Make<ChromeAppViewFactory>(core_app.Get());
-  hr = core_app->Run(view_factory.Get());
+  HRESULT hr = core_app->Run(view_factory.Get());
   DVLOG(1) << "exiting InitMetro, hr=" << hr;
 
 #if !defined(NDEBUG)
   ::RemoveVectoredExceptionHandler(registration);
 #endif
-
   return hr;
 }
 
 // Activates the application known by |app_id|.  Returns, among other things,
 // E_APPLICATION_NOT_REGISTERED if |app_id| identifies Chrome and Chrome is not
 // the default browser.
 extern "C" __declspec(dllexport)
 HRESULT ActivateApplication(const wchar_t* app_id) {
   base::win::ScopedComPtr<IApplicationActivationManager> activator;
   HRESULT hr = activator.CreateInstance(CLSID_ApplicationActivationManager);
   if (SUCCEEDED(hr)) {
     DWORD pid = 0;
     hr = activator->ActivateApplication(app_id, L"", AO_NONE, &pid);
   }
   return hr;
 }