Delete all log messages depending on system_wrappers.

webrtc/modules/desktop_capture/screen_capturer_mac.mm

Index: webrtc/modules/desktop_capture/screen_capturer_mac.mm
diff --git a/webrtc/modules/desktop_capture/screen_capturer_mac.mm b/webrtc/modules/desktop_capture/screen_capturer_mac.mm
index 78c2cf20b7a6ec41d49582ec61d1d36214cd0dda..94a2be21dda751058dc83b4d473ea34c848e85de 100644
--- a/webrtc/modules/desktop_capture/screen_capturer_mac.mm
+++ b/webrtc/modules/desktop_capture/screen_capturer_mac.mm
@@ -36,7 +36,6 @@
 #include "webrtc/modules/desktop_capture/screen_capture_frame_queue.h"
 #include "webrtc/modules/desktop_capture/screen_capturer_helper.h"
 #include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
-#include "webrtc/system_wrappers/include/logging.h"
 
 // Once Chrome no longer supports OSX 10.8, everything within this
 // preprocessor block can be removed. https://crbug.com/579255
@@ -693,7 +692,6 @@ bool ScreenCapturerMac::CgBlitPostLion(const DesktopFrame& frame,
     if (config) {
       displays_to_capture.push_back(*config);
     } else {
-      LOG(LS_ERROR) << "The selected screen cannot be found for capturing.";
       return false;
     }
   } else {
@@ -756,9 +754,6 @@ bool ScreenCapturerMac::CgBlitPostLion(const DesktopFrame& frame,
     // Verify that the image has 32-bit depth.
     int bits_per_pixel = CGImageGetBitsPerPixel(image);
     if (bits_per_pixel / 8 != DesktopFrame::kBytesPerPixel) {
-      LOG(LS_ERROR) << "CGDisplayCreateImage() returned imaged with "
-                    << bits_per_pixel
-                    << " bits per pixel. Only 32-bit depth is supported.";
       CFRelease(image);
       if (excluded_image)
         CFRelease(excluded_image);
@@ -851,7 +846,6 @@ void ScreenCapturerMac::ScreenConfigurationChanged() {
   // the machine has no monitor connected, so we fall back to depcreated APIs
   // when running on 10.6.
   if (rtc::GetOSVersionName() >= rtc::kMacOSLion) {
-    LOG(LS_INFO) << "Using CgBlitPostLion.";
     // No need for any OpenGL support on Lion
     return;
   }
@@ -860,13 +854,11 @@ void ScreenCapturerMac::ScreenConfigurationChanged() {
   app_services_library_ = dlopen(kApplicationServicesLibraryName,
                                  RTLD_LAZY);
   if (!app_services_library_) {
-    LOG_F(LS_ERROR) << "Failed to open " << kApplicationServicesLibraryName;
     abort();
   }
 
   opengl_library_ = dlopen(kOpenGlLibraryName, RTLD_LAZY);
   if (!opengl_library_) {
-    LOG_F(LS_ERROR) << "Failed to open " << kOpenGlLibraryName;
     abort();
   }
 
@@ -880,23 +872,18 @@ void ScreenCapturerMac::ScreenConfigurationChanged() {
       dlsym(opengl_library_, "CGLSetFullScreen"));
   if (!(cg_display_base_address_ && cg_display_bytes_per_row_ &&
         cg_display_bits_per_pixel_ && cgl_set_full_screen_)) {
-    LOG_F(LS_ERROR);
     abort();
   }
 
   if (desktop_config_.displays.size() > 1) {
-    LOG(LS_INFO) << "Using CgBlitPreLion (Multi-monitor).";
     return;
   }
 
   CGDirectDisplayID mainDevice = CGMainDisplayID();
   if (!CGDisplayUsesOpenGLAcceleration(mainDevice)) {
-    LOG(LS_INFO) << "Using CgBlitPreLion (OpenGL unavailable).";
     return;
   }
 
-  LOG(LS_INFO) << "Using GlBlit";
-
   CGLPixelFormatAttribute attributes[] = {
     // This function does an early return if GetOSVersionName() >= kMacOSLion,
     // this code only runs on 10.6 and can be deleted once 10.6 support is