4 spaces for tab size in view source.

third_party/WebKit/Source/core/css/view-source.css

Index: third_party/WebKit/Source/core/css/view-source.css
diff --git a/third_party/WebKit/Source/core/css/view-source.css b/third_party/WebKit/Source/core/css/view-source.css
index b56dcd9fc0c64d573800d8b5dd2b976c22050b71..314d9df99a387a26b9b7da922b29d1e3abcfdd27 100644
--- a/third_party/WebKit/Source/core/css/view-source.css
+++ b/third_party/WebKit/Source/core/css/view-source.css
@@ -19,7 +19,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 body {
@@ -34,6 +34,7 @@ table {
     word-break: break-word;
     font-size: initial;
     font-family: monospace;
+    tab-size: 4;
 }
 
 td {