title: Error 'GoogleDataTransport/GDTClock.h' file not found
body: <p>The problem is where I add "pod 'Firebase'" to Podfile and try run my app. I added GoogleService-Info.plist and try to add my app to firebase. How to fix it?</p>
  
  <pre><code>Xcode's output:
  ↳
      In file included from
  /AndroidStudioProjects/wts101/ios/Pods/GoogleDataTransportCCTSupport/GoogleDataTransportCCTSupport/GDTCCTLibrary/GDTCCTUploader.m:17:
      //AndroidStudioProjects/wts101/ios/Pods/GoogleDataTransportCCTSupport/GoogleDataTransportCCTSupport/GDTCCTLibrary/Private/GDTCCTUploader.h:19:9: fatal error: 'GoogleDataTransport/GDTUploader.h' file not found
      #import &lt;GoogleDataTransport/GDTUploader.h&gt;
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      1 error generated.
      In file included from //AndroidStudioProjects/wts101/ios/Pods/GoogleDataTransportCCTSupport/GoogleDataTransportCCTSupport/GDTCCTLibrary/GDTCCTNanopbHelpers.m:17:
      //AndroidStudioProjects/wts101/ios/Pods/GoogleDataTransportCCTSupport/GoogleDataTransportCCTSupport/GDTCCTLibrary/Private/GDTCCTNanopbHelpers.h:19:9: fatal error: 'GoogleDataTransport/GDTStoredEvent.h' file not found
      #import &lt;GoogleDataTransport/GDTStoredEvent.h&gt;
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      1 error generated.
      In file included from //AndroidStudioProjects/wts101/ios/Pods/GoogleDataTransportCCTSupport/GoogleDataTransportCCTSupport/GDTCCTLibrary/GDTCCTPrioritizer.m:17:
      //AndroidStudioProjects/wts101/ios/Pods/GoogleDataTransportCCTSupport/GoogleDataTransportCCTSupport/GDTCCTLibrary/Private/GDTCCTPrioritizer.h:19:9: fatal error: 'GoogleDataTransport/GDTClock.h' file not found
      #import &lt;GoogleDataTransport/GDTClock.h&gt;
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      1 error generated.
      //AndroidStudioProjects/wts101/ios/Pods/FirebaseCoreDiagnostics/Firebase/CoreDiagnostics/FIRCDLibrary/FIRCoreDiagnostics.m:20:9: fatal error: 'GoogleDataTransport/GDTConsoleLogger.h' file not found
      #import &lt;GoogleDataTransport/GDTConsoleLogger.h&gt;
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      1 error generated.
      ld: framework not found FirebaseCoreDiagnostics
      clang: error: linker command failed with exit code 1 (use -v to see invocation)
      note: Using new build systemnote: Planning buildnote: Constructing build description
  
  </code></pre>