Slightly simplify icu.gyp.

icu.gyp

Index: icu.gyp
===================================================================
--- icu.gyp	(revision 259309)
+++ icu.gyp	(working copy)
@@ -155,6 +155,22 @@
               'source/i18n',
             ],
           },
+          # Since ICU wants to internally use its own deprecated APIs, don't
+          # complain about it.
+          'cflags': [
+            '-Wno-deprecated-declarations',
+          ],
+          'cflags_cc': [
+            '-frtti',
+          ],
+          'xcode_settings': {
+            'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
+          },
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              'RuntimeTypeInfo': 'true',
+            },
+          },
           'conditions': [
             [ 'use_system_icu==1 and want_separate_host_toolset==1', {
               'toolsets': ['host'],
@@ -165,28 +181,6 @@
             [ 'use_system_icu==0 and want_separate_host_toolset==0', {
               'toolsets': ['target'],
             }],
-            [ 'os_posix == 1 and OS != "mac" and OS != "ios"', {
-              # Since ICU wants to internally use its own deprecated APIs, don't
-              # complain about it.
-              'cflags': [
-                '-Wno-deprecated-declarations',
-              ],
-              'cflags_cc': [
-                '-frtti',
-              ],
-            }],
-            ['OS == "mac" or OS == "ios"', {
-              'xcode_settings': {
-                'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
-              },
-            }],
-            ['OS == "win"', {
-              'msvs_settings': {
-                'VCCLCompilerTool': {
-                  'RuntimeTypeInfo': 'true',
-                },
-              }
-            }],
             ['clang==1', {
               'xcode_settings': {
                 'WARNING_CFLAGS': [
@@ -262,6 +256,23 @@
               }],
             ],
           },
+          'cflags': [
+            # Since ICU wants to internally use its own deprecated APIs,
+            # don't complain about it.
+            '-Wno-deprecated-declarations',
+            '-Wno-unused-function',
+          ],
+          'cflags_cc': [
+            '-frtti',
+          ],
+          'xcode_settings': {
+            'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
+          },
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              'RuntimeTypeInfo': 'true',
+            },
+          },
           'conditions': [
             [ 'use_system_icu==1 and want_separate_host_toolset==1', {
               'toolsets': ['host'],
@@ -277,29 +288,6 @@
                 'source/stubdata/stubdata.c',
               ],
             }],
-            [ 'os_posix == 1 and OS != "mac" and OS != "ios"', {
-              'cflags': [
-                # Since ICU wants to internally use its own deprecated APIs,
-                # don't complain about it.
-                '-Wno-deprecated-declarations',
-                '-Wno-unused-function',
-              ],
-              'cflags_cc': [
-                '-frtti',
-              ],
-            }],
-            ['OS == "mac" or OS == "ios"', {
-              'xcode_settings': {
-                'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
-              },
-            }],
-            ['OS == "win"', {
-              'msvs_settings': {
-                'VCCLCompilerTool': {
-                  'RuntimeTypeInfo': 'true',
-                },
-              },
-            }],
             ['OS == "android" and use_system_stlport == 1', {
               'target_conditions': [
                 ['_toolset == "target"', {