Implement browser-side logging to WebRtc log

content/browser/renderer_host/media/desktop_capture_device.cc

Index: content/browser/renderer_host/media/desktop_capture_device.cc
diff --git a/content/browser/renderer_host/media/desktop_capture_device.cc b/content/browser/renderer_host/media/desktop_capture_device.cc
index d09131b1b53df32fab5c5855d246ffb8ce3b1654..f9906a0176de356ca9d1805fc3f87a0a85bd0bc9 100644
--- a/content/browser/renderer_host/media/desktop_capture_device.cc
+++ b/content/browser/renderer_host/media/desktop_capture_device.cc
@@ -165,8 +165,9 @@ void DesktopCaptureDevice::Core::OnCaptureCompleted(
   capture_in_progress_ = false;
 
   if (!frame) {
-    LOG(ERROR) << "Failed to capture a frame.";
-    client_->OnError();
+    std::stringstream log("Failed to capture a frame.");

[tommi (sloooow) - chröme, 2014/01/24 12:34:54]

stringstream is overkill, just use std::string.

[vrk (LEFT CHROMIUM), 2014/01/25 00:50:21]

Done, here and elsewhere.

+    LOG(ERROR) << log;
+    client_->OnError(log.str());
     return;
   }