Add images of indeterminate checkboxes for Linux.

These iamge were based on existing linux-checkbox-*.png and modified
by tkent.

BUG=36321
TEST=none
Review URL: http://codereview.chromium.org/2883013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51502 0039d316-1c4b-4281-b951-d872f2087c98

webkit/glue/webkit_resources.grd

@@ -29,8 +29,10 @@
       <if expr="os == 'linux2' or os.find('bsd') != -1 or os == 'sunos5'">
         <include name="IDR_LINUX_CHECKBOX_OFF" file="resources\linux-checkbox-off.png" type="BINDATA" />
         <include name="IDR_LINUX_CHECKBOX_ON" file="resources\linux-checkbox-on.png" type="BINDATA" />
+        <include name="IDR_LINUX_CHECKBOX_INDETERMINATE" file="resources\linux-checkbox-indeterminate.png" type="BINDATA" />
         <include name="IDR_LINUX_CHECKBOX_DISABLED_OFF" file="resources\linux-checkbox-disabled-off.png" type="BINDATA" />
         <include name="IDR_LINUX_CHECKBOX_DISABLED_ON" file="resources\linux-checkbox-disabled-on.png" type="BINDATA" />
+        <include name="IDR_LINUX_CHECKBOX_DISABLED_INDETERMINATE" file="resources\linux-checkbox-disabled-indeterminate.png" type="BINDATA" />
         <include name="IDR_LINUX_RADIO_OFF" file="resources\linux-radio-off.png" type="BINDATA" />
         <include name="IDR_LINUX_RADIO_ON" file="resources\linux-radio-on.png" type="BINDATA" />
         <include name="IDR_LINUX_RADIO_DISABLED_OFF" file="resources\linux-radio-disabled-off.png" type="BINDATA" />

webkit/glue/webkitclient_impl.cc

@@ -254,8 +254,11 @@ WebData WebKitClientImpl::loadResource(const char* name) {
     // TODO(port): rename these to "skia" instead of "Linux".
     { "linuxCheckboxOff", IDR_LINUX_CHECKBOX_OFF },
     { "linuxCheckboxOn", IDR_LINUX_CHECKBOX_ON },
+    { "linuxCheckboxIndeterminate", IDR_LINUX_CHECKBOX_INDETERMINATE },
     { "linuxCheckboxDisabledOff", IDR_LINUX_CHECKBOX_DISABLED_OFF },
     { "linuxCheckboxDisabledOn", IDR_LINUX_CHECKBOX_DISABLED_ON },
+    { "linuxCheckboxDisabledIndeterminate",
+      IDR_LINUX_CHECKBOX_DISABLED_INDETERMINATE },
     { "linuxRadioOff", IDR_LINUX_RADIO_OFF },
     { "linuxRadioOn", IDR_LINUX_RADIO_ON },
     { "linuxRadioDisabledOff", IDR_LINUX_RADIO_DISABLED_OFF },