Suppress -Wswitch for pdfium's fxge target for now.

pdfium.gyp

 {
   'variables': {
     'pdf_use_skia%': 0,
     'conditions': [
       ['OS=="linux"', {
         'bundle_freetype%': 0,
       }, {  # On Android there's no system FreeType. On Windows and Mac, only a
             # few methods are used from it.
         'bundle_freetype%': 1,
       }],
@@ skipping 481 matching lines @@
         'core/src/fxge/ge/fx_ge.cpp',
         'core/src/fxge/ge/fx_ge_device.cpp',
         'core/src/fxge/ge/fx_ge_font.cpp',
         'core/src/fxge/ge/fx_ge_fontmap.cpp',
         'core/src/fxge/ge/fx_ge_linux.cpp',
         'core/src/fxge/ge/fx_ge_path.cpp',
         'core/src/fxge/ge/fx_ge_ps.cpp',
         'core/src/fxge/ge/fx_ge_text.cpp',
         'core/src/fxge/ge/text_int.h',
       ],
+      'variables': {
+        'clang_warning_flags': [
+          # http://code.google.com/p/pdfium/issues/detail?id=188
+          '-Wno-switch',
+        ],
+      },
       'conditions': [
         ['pdf_use_skia==1', {
           'sources': [
             'core/src/fxge/skia/fx_skia_blitter_new.cpp',
             'core/src/fxge/skia/fx_skia_device.cpp',
           ],
           'dependencies': [
             '<(DEPTH)/skia/skia.gyp:skia',
           ],
           'include_dirs': [
@@ skipping 236 matching lines @@
         'testing/embedder_test.cpp',
         'testing/embedder_test.h',
         'testing/embedder_test_mock_delegate.h',
         'testing/embedder_test_timer_handling_delegate.h',
         'testing/fx_string_testhelpers.cpp',
         'testing/fx_string_testhelpers.h',
       ],
     },
   ],
 }