BUILD FIX (r147494): -[AVAudioSession setCategory:error:] takes NSError**

Fixes the following build failure:

    Source/WebCore/platform/audio/ios/AudioSessionIOS.mm:151:71: error: cannot initialize a parameter of type 'NSError **' with an lvalue of type 'NSError *'
        [[AVAudioSession sharedInstance] setCategory:categoryString error:error];
                                                                          ^~~~~

* platform/audio/ios/AudioSessionIOS.mm:
(WebCore::AudioSession::setCategory): Add '&' operator.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147560 268f45cc-cd09-0410-ab3c-d52691b4dbfc
BUILD FIX (r147493): Fix number of arguments to AudioDestinationIOS constructor

Fixes the following build failures:

    Source/WebCore/platform/audio/ios/AudioDestinationIOS.cpp:84:25: error: no matching constructor for initialization of 'WebCore::AudioDestinationIOS'
        return adoptPtr(new AudioDestinationIOS(callback, sampleRate));
                            ^                   ~~~~~~~~~~~~~~~~~~~~
    In file included from Source/WebCore/platform/audio/ios/AudioDestinationIOS.cpp:36:
    Source/WebCore/platform/audio/ios/AudioDestinationIOS.h:44:5: note: candidate constructor not viable: requires 3 arguments, but 2 were provided
        AudioDestinationIOS(AudioIOCallback&, unsigned numberOfOutputChannels, double sampleRate);
        ^
    Source/WebCore/platform/audio/ios/AudioDestinationIOS.h:42:7: note: candidate constructor (the implicit copy constructor) not viable: requires 1 argument, but 2 were provided
    class AudioDestinationIOS : public AudioDestination, public AudioSessionListener {
          ^
    Source/WebCore/platform/audio/ios/AudioDestinationIOS.cpp:101:22: error: out-of-line definition of 'AudioDestinationIOS' does not match any declaration in 'WebCore::AudioDestinationIOS'
    AudioDestinationIOS::AudioDestinationIOS(AudioIOCallback& callback, double sampleRate)
                         ^~~~~~~~~~~~~~~~~~~
    2 errors generated.

* platform/audio/ios/AudioDestinationIOS.h:
(AudioDestinationIOS): Remove numberOfOutputChannels argument.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147561 268f45cc-cd09-0410-ab3c-d52691b4dbfc