Create top-level public/ header directory.

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 43 matching lines @@
         'fxcodec',
         'fxcrt',
         'fxedit',
         'fxge',
         'javascript',
         'jsapi',
         'pdfwindow',
       ],
       'ldflags': [ '-L<(PRODUCT_DIR)',],
       'sources': [
-        'fpdfsdk/include/fpdfdoc.h',
-        'fpdfsdk/include/fpdfedit.h',
-        'fpdfsdk/include/fpdfformfill.h',
-        'fpdfsdk/include/fpdftext.h',
-        'fpdfsdk/include/fpdfview.h',
-        'fpdfsdk/include/fpdf_dataavail.h',
-        'fpdfsdk/include/fpdf_flatten.h',
-        'fpdfsdk/include/fpdf_progressive.h',
-        'fpdfsdk/include/fpdf_searchex.h',
-        'fpdfsdk/include/fpdf_sysfontinfo.h',
-        'fpdfsdk/include/fpdf_ext.h',
-        'fpdfsdk/include/fpdf_sysfontinfo.h',
         'fpdfsdk/include/fsdk_actionhandler.h',
         'fpdfsdk/include/fsdk_annothandler.h',
         'fpdfsdk/include/fsdk_baseannot.h',
         'fpdfsdk/include/fsdk_baseform.h',
         'fpdfsdk/src/fpdfdoc.cpp',
         'fpdfsdk/src/fpdfeditimg.cpp',
         'fpdfsdk/src/fpdfeditpage.cpp',
         'fpdfsdk/src/fpdfformfill.cpp',
         'fpdfsdk/src/fpdfppo.cpp',
         'fpdfsdk/src/fpdfsave.cpp',
         'fpdfsdk/src/fpdftext.cpp',
         'fpdfsdk/src/fpdfview.cpp',
         'fpdfsdk/src/fpdf_dataavail.cpp',
         'fpdfsdk/src/fpdf_ext.cpp',
         'fpdfsdk/src/fpdf_flatten.cpp',
         'fpdfsdk/src/fpdf_progressive.cpp',
         'fpdfsdk/src/fpdf_searchex.cpp',
         'fpdfsdk/src/fpdf_sysfontinfo.cpp',
+        'fpdfsdk/src/fpdf_transformpage.cpp',
         'fpdfsdk/src/fsdk_actionhandler.cpp',
         'fpdfsdk/src/fsdk_annothandler.cpp',
         'fpdfsdk/src/fsdk_baseannot.cpp',
         'fpdfsdk/src/fsdk_baseform.cpp',
         'fpdfsdk/src/fsdk_mgr.cpp',
         'fpdfsdk/src/fsdk_rendercontext.cpp',
         'fpdfsdk/src/fpdfsdkdll.rc',
         'fpdfsdk/src/resource.h',
-        'fpdfsdk/include/fpdf_transformpage.h',
-        'fpdfsdk/src/fpdf_transformpage.cpp',
+        'public/fpdf_dataavail.h',
+        'public/fpdf_doc.h',
+        'public/fpdf_edit.h',
+        'public/fpdf_ext.h',
+        'public/fpdf_flatten.h',
+        'public/fpdf_formfill.h',
+        'public/fpdf_fwlevent.h',
+        'public/fpdf_ppo.h',
+        'public/fpdf_progressive.h',
+        'public/fpdf_save.h',
+        'public/fpdf_searchex.h',
+        'public/fpdf_sysfontinfo.h',
+        'public/fpdf_text.h',
+        'public/fpdf_transformpage.h',
+        'public/fpdfview.h',
       ],
       'conditions': [
         ['OS!="win"', {
           'sources!': [
             'fpdfsdk/src/fpdfsdkdll.rc',
           ],
         }],
         ['bundle_freetype==1', {
           'dependencies': [
             'third_party/third_party.gyp:freetype',
@@ skipping 750 matching lines @@
         'fpdfsdk/src/fpdfview_embeddertest.cpp',
         'testing/embedder_test.cpp',
         'testing/embedder_test.h',
         'testing/embedder_test_mock_delegate.h',
         'testing/fx_string_testhelpers.cpp',
         'testing/fx_string_testhelpers.h',
       ],
     },
   ],
 }