Enable compiling with clang chrome plugins for GYP build

build_gyp/standalone.gypi

 # Copyright 2014 PDFium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Definitions to be used when building stand-alone PDFium binaries.
 
 {
   'variables': {
     'component%': 'static_library',
     'chromium_code%': 0,
@@ skipping 24 matching lines @@
               # OS!="linux" and OS!="mac"
               'host_arch%': 'ia32',
             }],
           ],
         },
         'host_arch%': '<(host_arch)',
         'target_arch%': '<(host_arch)',
       },
       'host_arch%': '<(host_arch)',
       'target_arch%': '<(target_arch)',
+      'clang_use_chrome_plugins%': 0,
     },
     'clang_dir%': 'third_party/llvm-build/Release+Asserts',
+    'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
     # These two are needed by V8.
     'host_arch%': '<(host_arch)',
     'target_arch%': '<(target_arch)',
     'werror%': '-Werror',
     'v8_optimized_debug%': 0,
     'v8_use_external_startup_data%': 0,
     'icu_gyp_path': '../third_party/icu/icu.gyp',
     'libjpeg_gyp_path': '../third_party/third_party.gyp',
     'conditions': [
       ['OS == "win"', {
         'os_posix%': 0,
       }, {
         'os_posix%': 1,
       }],
       ['OS=="linux" or OS=="mac"', {
         'clang%': 1,
         'host_clang%': 1,
       }, {
         'clang%': 0,
         'host_clang%': 0,
       }],
       # Set default gomadir.
       ['OS=="win"', {
         'gomadir%': 'c:\\goma\\goma-win64',
       }, {
         'gomadir%': '<!(/bin/echo -n ${HOME}/goma)',
       }],
+      ['clang_use_chrome_plugins==1', {
+        # Share the same settings as chromium in build/common.gypi.
+        'variables': {
+          'conditions': [
+            ['OS!="win"', {
+              'variables': {
+                'conditions': [
+                  ['OS=="mac" or OS=="ios"', {
+                    'clang_lib_path%': '<!(cd <(DEPTH) && pwd -P)/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib',
+                  }, { # OS != "mac" and OS != "ios"
+                    'clang_lib_path%': '<!(cd <(DEPTH) && pwd -P)/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so',
+                  }],
+                ],
+              },
+              'clang_dynlib_flags%': '-Xclang -load -Xclang <(clang_lib_path) ',
+            }, { # OS == "win"
+              # On Windows, the plugin is built directly into clang, so there's
+              # no need to load it dynamically.
+              'clang_dynlib_flags%': '',
+            }],
+            ['OS=="android" or OS=="linux"', {
+              'clang_plugin_check_ipc_arg': '-Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc',
+            }, {
+              'clang_plugin_check_ipc_arg': '',
+            }],
+          ],
+          'clang_plugin_args%': '-Xclang -plugin-arg-find-bad-constructs -Xclang check-templates '
+          '-Xclang -plugin-arg-find-bad-constructs -Xclang follow-macro-expansion '
+          '-Xclang -plugin-arg-find-bad-constructs -Xclang check-implicit-copy-ctors ',
+        },
+        'clang_chrome_plugins_flags%':
+          '<(clang_dynlib_flags)'
+          '-Xclang -add-plugin -Xclang find-bad-constructs <(clang_plugin_args) <(clang_plugin_check_ipc_arg)',
+      }],
     ],
   },
   'target_defaults': {
     'default_configuration': 'Debug',
     'configurations': {
       'Debug': {
         'cflags': [
           '-g',
           '-O0',
           '-fdata-sections',
@@ skipping 235 matching lines @@
               # pattern.
               '-Wno-missing-field-initializers',
 
               # TODO(hans): Make this list shorter eventually, http://crbug.com/504657
               '-Qunused-arguments',  # http://crbug.com/504658
               '-Wno-microsoft-enum-value',  # http://crbug.com/505296
               '-Wno-unknown-pragmas',  # http://crbug.com/505314
               '-Wno-microsoft-cast',  # http://crbug.com/550065
             ],
           }],
+          ['clang==1 and clang_use_chrome_plugins==1', {
+            'AdditionalOptions': [
+              '<@(clang_chrome_plugins_flags)',
+            ],
+          }],
           ['OS=="win" and clang==1 and MSVS_VERSION == "2013"', {
             'AdditionalOptions': [
               '-fmsc-version=1800',
             ],
           }],
           ['OS=="win" and clang==1 and MSVS_VERSION == "2015"', {
             'AdditionalOptions': [
               '-fmsc-version=1900',
             ],
           }],
@@ skipping 32 matching lines @@
       'USE_HEADERMAP': 'NO',
       'OTHER_CFLAGS': [
         '-fno-strict-aliasing',
       ],
       'WARNING_CFLAGS': [
         '-Wall',
         '-Werror',
         '-Wextra',
         '-Wno-unused-parameter',
       ],
+      'conditions': [
+        ['clang==1 and clang_use_chrome_plugins==1', {
+          'OTHER_CFLAGS': [
+            '<@(clang_chrome_plugins_flags)',
+          ],
+        }],
+      ],
     },
     'variables': {
       'chromium_code%': '<(chromium_code)',
       'clang_warning_flags': [
         # TODO(thakis): https://crbug.com/604888
         '-Wno-undefined-var-template',
       ],
     },
     'includes': [ 'set_clang_warning_flags.gypi', ],
     'conditions': [
+      ['clang==1 and clang_use_chrome_plugins==1', {
+        'cflags': [
+          '<@(clang_chrome_plugins_flags)',
+        ],
+      }],
       ['component=="shared_library"', {
         'cflags': [
           '-fPIC',
         ],
       }],
       ['asan==1', {
         'defines': [
           'ADDRESS_SANITIZER',
           'LEAK_SANITIZER',
         ],
@@ skipping 128 matching lines @@
       ],
     }],  # OS=="win"
     ["use_goma==1", {
       'make_global_settings': [
         ['CC_wrapper', '<(gomadir)/gomacc'],
         ['CXX_wrapper', '<(gomadir)/gomacc'],
       ],
     }],  # use_goma==1
   ],
 }