Remove suppression of PointerLockController uninitialized members.

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 6054 matching lines @@
 {
    bug_293033
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7WebCore11ScriptState10forContextEN2v86HandleINS1_7ContextEEE
    ...
    fun:_ZN7WebCore*V8InternalL*MethodERKN2v820FunctionCallbackInfoINS1_5ValueEEE
    fun:_ZN7WebCore*V8InternalL*MethodCallbackERKN2v820FunctionCallbackInfoINS1_5ValueEEE
 }
 {
-   bug_293049
-   Memcheck:Uninitialized
-   fun:_ZNK7WebCore8Document24webkitPointerLockElementEv
-   fun:_ZN7WebCore18DocumentV8InternalL39webkitPointerLockElementAttributeGetter*
-   fun:_ZN7WebCore18DocumentV8InternalL47webkitPointerLockElementAttributeGetterCallback*
-   fun:_ZN2v88internal25PropertyCallbackArguments4CallEPFvNS_5LocalINS_6StringEEERKNS_20PropertyCallbackInfoINS_5ValueEEEES4_
-}
-{
    bug_293058_a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7content12_GLOBAL__N_123WaitableCallbackResultsC1Ev
    fun:_ZN7content12_GLOBAL__N_123WaitableCallbackResults11MaybeCreateERKN5blink22WebFileSystemCallbacksE
    fun:_ZN7content17WebFileSystemImpl*
 }
 {
    bug_293058_b
    Memcheck:Leak
@@ skipping 300 matching lines @@
 }
 {
    bug_332335
    Memcheck:Param
    sendmsg(msg.msg_iov[0])
    fun:sys_sendmsg
    fun:_ZN8breakpad12_GLOBAL__N_122NonBrowserCrashHandlerEPKvmPv
    fun:_ZN15google_breakpad16ExceptionHandler12HandleSignalEiP7siginfoPv
    fun:_ZN15google_breakpad16ExceptionHandler13SignalHandlerEiP7siginfoPv
 }