mac: Add MEDIA_EXPORT macros needed to link tests in the shared build

BUG=90078
TEST=none

Review URL: http://codereview.chromium.org/9701065

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126961 0039d316-1c4b-4281-b951-d872f2087c98

media/audio/mac/audio_low_latency_input_mac.h

@@ -66,7 +66,7 @@ class AUAudioInputStream : public AudioInputStream {
   virtual double GetVolume() OVERRIDE;
 
   // Returns the current hardware sample rate for the default input device.
-  static double HardwareSampleRate();
+  MEDIA_EXPORT static double HardwareSampleRate();
 
   bool started() const { return started_; }
   AudioUnit audio_unit() { return audio_unit_; }

media/audio/mac/audio_manager_mac.h

@@ -12,7 +12,7 @@
 // Mac OS X implementation of the AudioManager singleton. This class is internal
 // to the audio output and only internal users can call methods not exposed by
 // the AudioManager class.
-class AudioManagerMac : public AudioManagerBase {
+class MEDIA_EXPORT AudioManagerMac : public AudioManagerBase {
  public:
   AudioManagerMac();