[Chromoting] Remove screen saver logic out of ScreenCapturer implementations

After change https://codereview.chromium.org/2080723008/, chromoting hosts are
using device::PowerSaveBlocker to block screen saver and suspend. So similar
logic in ScreenCapturer are not useful, and should be removed.

BUG=626839

Review-Url: https://codereview.webrtc.org/2155813003
Cr-Commit-Position: refs/heads/master@{#13491}

webrtc/modules/desktop_capture/screen_capturer_mac.mm

@@ -18,7 +18,6 @@
 #include <ApplicationServices/ApplicationServices.h>
 #include <Cocoa/Cocoa.h>
 #include <dlfcn.h>
-#include <IOKit/pwr_mgt/IOPMLib.h>
 #include <OpenGL/CGLMacro.h>
 #include <OpenGL/OpenGL.h>
 
@@ -262,12 +261,6 @@ class ScreenCapturerMac : public ScreenCapturer {
   // Monitoring display reconfiguration.
   rtc::scoped_refptr<DesktopConfigurationMonitor> desktop_config_monitor_;
 
-  // Power management assertion to prevent the screen from sleeping.
-  IOPMAssertionID power_assertion_id_display_ = kIOPMNullAssertionID;
-
-  // Power management assertion to indicate that the user is active.
-  IOPMAssertionID power_assertion_id_user_ = kIOPMNullAssertionID;
-
   // Dynamically link to deprecated APIs for Mac OS X 10.6 support.
   void* app_services_library_ = nullptr;
   CGDisplayBaseAddressFunc cg_display_base_address_ = nullptr;
@@ -309,15 +302,6 @@ ScreenCapturerMac::ScreenCapturerMac(
     : desktop_config_monitor_(desktop_config_monitor) {}
 
 ScreenCapturerMac::~ScreenCapturerMac() {
-  if (power_assertion_id_display_ != kIOPMNullAssertionID) {
-    IOPMAssertionRelease(power_assertion_id_display_);
-    power_assertion_id_display_ = kIOPMNullAssertionID;
-  }
-  if (power_assertion_id_user_ != kIOPMNullAssertionID) {
-    IOPMAssertionRelease(power_assertion_id_user_);
-    power_assertion_id_user_ = kIOPMNullAssertionID;
-  }
-
   ReleaseBuffers();
   UnregisterRefreshAndMoveHandlers();
   dlclose(app_services_library_);
@@ -352,21 +336,6 @@ void ScreenCapturerMac::Start(Callback* callback) {
   assert(callback);
 
   callback_ = callback;
-
-  // Create power management assertions to wake the display and prevent it from
-  // going to sleep on user idle.
-  // TODO(jamiewalch): Use IOPMAssertionDeclareUserActivity on 10.7.3 and above
-  //                   instead of the following two assertions.
-  IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep,
-                              kIOPMAssertionLevelOn,
-                              CFSTR("Chrome Remote Desktop connection active"),
-                              &power_assertion_id_display_);
-  // This assertion ensures that the display is woken up if it  already asleep
-  // (as used by Apple Remote Desktop).
-  IOPMAssertionCreateWithName(CFSTR("UserIsActive"),
-                              kIOPMAssertionLevelOn,
-                              CFSTR("Chrome Remote Desktop connection active"),
-                              &power_assertion_id_user_);
 }
 
 void ScreenCapturerMac::Capture(const DesktopRegion& region_to_capture) {

webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc

@@ -452,7 +452,7 @@ bool ScreenCapturerWinDirectx::ForceDuplicateOutput() {
 
 ScreenCapturerWinDirectx::ScreenCapturerWinDirectx(
     const DesktopCaptureOptions& options)
-    : callback_(nullptr), set_thread_execution_state_failed_(false) {
+    : callback_(nullptr) {
   RTC_DCHECK(g_container && g_container->initialize_result);
 
   // Texture instance won't change forever.
@@ -629,14 +629,6 @@ void ScreenCapturerWinDirectx::Capture(const DesktopRegion& region) {
   RTC_DCHECK(g_container->duplication);
   int64_t capture_start_time_nanos = rtc::TimeNanos();
 
-  if (!SetThreadExecutionState(ES_DISPLAY_REQUIRED | ES_SYSTEM_REQUIRED)) {
-    if (!set_thread_execution_state_failed_) {
-      set_thread_execution_state_failed_ = true;
-      LOG(LS_WARNING) << "Failed to make system & display power assertion: "
-                      << GetLastError();
-    }
-  }
-
   DXGI_OUTDUPL_FRAME_INFO frame_info;
   memset(&frame_info, 0, sizeof(DXGI_OUTDUPL_FRAME_INFO));
   ComPtr<IDXGIResource> resource;

webrtc/modules/desktop_capture/win/screen_capturer_win_directx.h

@@ -95,8 +95,6 @@ class ScreenCapturerWinDirectx : public ScreenCapturer {
   std::unique_ptr<SharedMemoryFactory> shared_memory_factory_;
   Callback* callback_ = nullptr;
 
-  bool set_thread_execution_state_failed_ = false;
-
   RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerWinDirectx);
 };
 

webrtc/modules/desktop_capture/win/screen_capturer_win_gdi.cc

@@ -78,15 +78,6 @@ void ScreenCapturerWinGdi::Capture(const DesktopRegion& region) {
   queue_.MoveToNextFrame();
   RTC_DCHECK(!queue_.current_frame() || !queue_.current_frame()->IsShared());
 
-  // Request that the system not power-down the system, or the display hardware.
-  if (!SetThreadExecutionState(ES_DISPLAY_REQUIRED | ES_SYSTEM_REQUIRED)) {
-    if (!set_thread_execution_state_failed_) {
-      set_thread_execution_state_failed_ = true;
-      LOG_F(LS_WARNING) << "Failed to make system & display power assertion: "
-                        << GetLastError();
-    }
-  }
-
   // Make sure the GDI capture resources are up-to-date.
   PrepareCaptureResources();
 

webrtc/modules/desktop_capture/win/screen_capturer_win_gdi.h

@@ -84,9 +84,6 @@ class ScreenCapturerWinGdi : public ScreenCapturer {
   HMODULE dwmapi_library_ = NULL;
   DwmEnableCompositionFunc composition_func_ = nullptr;
 
-  // Used to suppress duplicate logging of SetThreadExecutionState errors.
-  bool set_thread_execution_state_failed_ = false;
-
   RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerWinGdi);
 };