Add PDF viewer example.

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of 'src').
 #
@@ skipping 10 matching lines @@
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   'googlecode_url': 'http://%s.googlecode.com/svn',
   'sourceforge_url': 'http://svn.code.sf.net/p/%(repo)s/code',
   'llvm_url': 'http://src.chromium.org/llvm-project',
   'llvm_git': 'https://llvm.googlesource.com',
   'libcxx_revision': '48198f9110397fff47fe7c37cbfa296be7d44d3d',
   'libcxxabi_revision': '4ad1009ab3a59fa7a6896d74d5e4de5885697f95',
   'chromium_git': 'https://chromium.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
+  'pdfium_git': 'https://pdfium.googlesource.com',
   'boringssl_git': 'https://boringssl.googlesource.com',
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
   'skia_revision': '32501a1bd4964576264795ada7e9c3bf572285b3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   'v8_branch': 'trunk',
   'v8_revision': 'bfb312d4b40507780e15bfee2e0dc32f1391c4db', # from svn revision 24925
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
   "angle_revision": "d2f756be4fd198d630b64dc6c3568184363e6d14",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build tools
   # and whatever else without interference from each other.
   'buildtools_revision': '56bc51aff4175d3fa27dcd0faa2c345ab046c8a5',
   # Three lines of non-changing comments so that
+  # the commit queue can handle CLs rolling PDFium
+  # and whatever else without interference from each other.
+  'pdfium_revision': '767aebbef641a89498deebc29369a078207b4dcc',
+  # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.
   'boringssl_revision': '751e889b1d791d2b91c1437248454fa1d4e101a5',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling lss
   # and whatever else without interference from each other.
   'lss_revision': '952107fa7cea0daaabead28c0e92d579bee517eb',
 }
 
 # Only these hosts are allowed for dependencies in this DEPS file.
@@ skipping 58 matching lines @@
 
   'src/third_party/smhasher/src':
     Var('chromium_git') + '/external/smhasher.git' + '@' + 'e87738e57558e0ec472b2fc3a643b838e5b6e88f',
 
   'src/third_party/pywebsocket/src':
     Var('chromium_git') + '/external/pywebsocket/src.git' + '@' + 'cb349e87ddb30ff8d1fa1a89be39cec901f4a29c',
 
   'src/third_party/mesa/src':
    Var('chromium_git') + '/chromium/deps/mesa.git' + '@' + '9731cb962963bca8a05f3d0f6ea40c3a781f0537',
 
+  'src/third_party/pdfium':
+   'https://pdfium.googlesource.com/pdfium.git' + '@' +  Var('pdfium_revision'),
+
   'src/third_party/boringssl/src':
    'https://boringssl.googlesource.com/boringssl.git' + '@' +  Var('boringssl_revision'),
 }
 
 
 deps_os = {
   'unix': {
     # Linux, really.
     'src/third_party/lss':
       Var('chromium_git') + '/external/linux-syscall-support/lss.git' + '@' + Var('lss_revision'),
@@ skipping 146 matching lines @@
     # corresponding .py files have already been deleted.
     'name': 'remove_stale_pyc_files',
     'pattern': 'src/tools/.*\\.py',
     'action': [
         'python',
         'src/tools/remove_stale_pyc_files.py',
         'src/tools',
     ],
   },
 ]