Include pdfviewer in everything.

gyp/everything.gyp

 # Build EVERYTHING provided by Skia.
 # (Start with the "most" target, and then add targets that we intentionally
 # left out of "most".  See most.gyp for an explanation of which targets are
 # left out of "most".)
 #
 # We used to call this the 'all' target, but in SOME cases that
 # conflicted with an automatically-generated 'all' target.
 # See https://code.google.com/p/skia/issues/detail?id=932
 #
 {
   'targets': [
     {
       'target_name': 'everything',
       'type': 'none',
       'dependencies': [
         'most.gyp:most',
       ],
       'conditions': [
         ['skia_os in ("ios", "android", "chromeos") or (skia_os == "mac" and skia_arch_width == 32)', {
           # debugger is not supported on this platform
         }, {
-          'dependencies': [ 'debugger.gyp:debugger' ],
+          'dependencies': [
+            'debugger.gyp:debugger',
+            'pdfviewer.gyp:pdfviewer',
+            ],
         }],
         # DM assumes you've got a GPU.
         ['skia_gpu == 1', {
           'dependencies': [ 'dm.gyp:dm' ],
         }],
       ],
     },
   ],
 }
 
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