Refactor RenderThemeChromiumDefault

Source/core/core.gyp

Index: Source/core/core.gyp
diff --git a/Source/core/core.gyp b/Source/core/core.gyp
index bf643567ae4b5b81eddf2a9aea016e931ae8a357..51f28acc204bb01a5482a1c7e8f588199c9df692 100644
--- a/Source/core/core.gyp
+++ b/Source/core/core.gyp
@@ -562,6 +562,7 @@
         ['OS=="win"', {
           'sources/': [
             ['exclude', 'Posix\\.cpp$'],
+            ['include', 'rendering/RenderThemeChromiumDefault\\.cpp$'],

[tkent, 2014/11/21 01:22:37]

I think this is unnecessary.  core.gypi contains RenderThemeChromiumDefault.cpp
by default.

           ],
         },{ # OS!="win"
           'sources/': [
@@ -589,7 +590,11 @@
           # Due to a bug in gcc 4.6 in android NDK, we get warnings about uninitialized variable.
           'cflags': ['-Wno-uninitialized'],
         }],
-        ['OS != "linux"', {
+        ['OS == "linux"', {
+          'sources/': [
+            ['include', 'rendering/RenderThemeChromiumDefault\\.cpp$'],

[tkent, 2014/11/21 01:22:37]

Ditto.

+          ],
+        },{ # OS!="linux"
           'sources/': [
             ['exclude', 'Linux\\.cpp$'],
           ],