GTK: Initial implementation of using GTK themes, partially based on evan's CL 118358.

A lot of stuff works:
- Colors are picked out of the GTK theme.
- Buttons use the current GTK button theme.
- We use the user's icon theme.

A lot of stuff doesn't:
- We could do a better job of picking colors for the skylines.
- The omnibox hasn't been touched.
- UI that's not part of the toolbar hasn't been touched.
- We currently fail on themes like HighContrastInverse.

TEST=Under Options>Personal Stuff, click GTK Theme. Colors and widgets should be rendered with the current GTK theme stuff.
TEST=With chrome open and in GTK Theme mode, change your GTK theme or icon theme. chrome should pick up on the change immediately and reimport the colors and images.
http://crbug.com/13967

Review URL: http://codereview.chromium.org/150176

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@19868 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 0 deletions

diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 159e643..426adb1 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -249,6 +249,10 @@ const wchar_t kPrintingPageHeaderRight[] = L"printing.page.header.right";
 const wchar_t kPrintingPageFooterLeft[] = L"printing.page.footer.left";
 const wchar_t kPrintingPageFooterCenter[] = L"printing.page.footer.center";
 const wchar_t kPrintingPageFooterRight[] = L"printing.page.footer.right";
+#if defined(OS_LINUX)
+// GTK specific preference on whether we should match the system GTK theme.
+const wchar_t kUsesSystemTheme[] = L"extensions.theme.use_system";
+#endif
 const wchar_t kCurrentThemeID[] = L"extensions.theme.id";
 const wchar_t kCurrentThemeImages[] = L"extensions.theme.images";
 const wchar_t kCurrentThemeColors[] = L"extensions.theme.colors";