Suppress GDI usage error in content::DesktopCaptureDevice::Core

TBR=sergeyu@chromium.org
BUG=396639
NOTRY=true

Review URL: https://codereview.chromium.org/410193002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284929 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/drmemory/suppressions.txt

@@ -634,3 +634,11 @@ KERNEL32.dll!CreateWaitableTimerW
 *!content::RenderProcessHostImpl::CreateMessageFilters
 *!content::RenderProcessHostImpl::Init
 *!content::RenderViewHostImpl::CreateRenderView
+
+GDI USAGE ERROR
+name=http://crbug.com/396639
+system call NtUserCallOneParam.RELEASEDC
+USER32.dll!ReleaseDC
+*!webrtc::ScreenCapturerWinGdi::~ScreenCapturerWinGdi
+*!webrtc::ScreenCapturerWinGdi::`scalar deleting destructor'
+content.dll!content::DesktopCaptureDevice::Core::DoStopAndDeAllocate