pdfviewer: remove dependency on picture_utils. add utility function to render SkStream into bitmap.

gyp/pdfviewer.gyp

 # GYP file to build pdfviewer.
 #
 # To build on Linux:
 #  ./gyp_skia pdfviewer.gyp && make pdfviewer
 #
 {
   'includes': [
     'apptype_console.gypi',
   ],
   'targets': [
     {
       'target_name': 'libpdfviewer',
       'type': 'static_library',
-      'cflags': ['-fexceptions'],
-      'cflags_cc': ['-fexceptions'],
-      'cflags!': [ '-fno-exceptions' ],
-      'cflags_cc!': [ '-fno-exceptions' ],
       'sources': [
         '../experimental/PdfViewer/SkPdfBasics.cpp',
         '../experimental/PdfViewer/SkPdfFont.cpp',
         '../experimental/PdfViewer/SkPdfRenderer.cpp',
         '../experimental/PdfViewer/SkPdfUtils.cpp',
         #'../experimental/PdfViewer/SkPdfNYI.cpp',
         '../experimental/PdfViewer/SkTrackDevice.cpp',
         '../experimental/PdfViewer/SkTracker.cpp',
         '../experimental/PdfViewer/pdfparser/native/SkPdfObject.cpp',
         '../experimental/PdfViewer/pdfparser/native/SkPdfNativeTokenizer.cpp',
@@ skipping 56 matching lines @@
         '../experimental/PdfViewer',
         '../experimental/PdfViewer/pdfparser',
         '../experimental/PdfViewer/pdfparser/autogen',
         '../experimental/PdfViewer/pdfparser/native',
         '../experimental/PdfViewer/pdfparser/native/autogen',
       ],
       'dependencies': [
         'core.gyp:core',
         'flags.gyp:flags',
         'libpdfviewer',
-        'tools.gyp:picture_utils',
       ],
     },
   ],
 }
 
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