Valgrind: Add a suppression for new leaks from Skia.

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing.
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 2233 matching lines @@
    fun:_ZN7WebCoreL11pngCompleteEP14png_struct_defP15png_info_struct
    fun:wk_png_push_read_chunk
    fun:wk_png_process_data
    fun:_ZN7WebCore14PNGImageReader6decodeERKNS_12SharedBufferEb
    fun:_ZN7WebCore15PNGImageDecoder6decodeEb
    fun:_ZN7WebCore15PNGImageDecoder18frameBufferAtIndexEm
    fun:_ZN7WebCore11ImageSource18createFrameAtIndexEm
    fun:_ZN6WebKit8WebImage8fromDataERKNS_7WebDataERKNS_7WebSizeE
    fun:_ZNK11webkit_glue12ImageDecoder6DecodeEPKhm
 }
+{
+   bug_107158
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZL14NewFromFontRefPK8__CTFontPKc
+   fun:_Z26SkCreateTypefaceFromCTFontPK8__CTFont
+   fun:_ZN7WebCoreL10setupPaintEP7SkPaintPKNS_14SimpleFontDataEPKNS_4FontEbb
+   fun:_ZNK7WebCore4Font10drawGlyphsEPNS_15GraphicsContextEPKNS_14SimpleFontDataERKNS_11GlyphBufferEiiRKNS_10FloatPointE
+   fun:_ZNK7WebCore4Font15drawGlyphBufferEPNS_15GraphicsContextERKNS_7TextRunERKNS_11GlyphBufferERKNS_10FloatPointE
+   fun:_ZNK7WebCore4Font14drawSimpleTextEPNS_15GraphicsContextERKNS_7TextRunERKNS_10FloatPointEii
+   fun:_ZNK7WebCore4Font8drawTextEPNS_15GraphicsContextERKNS_7TextRunERKNS_10FloatPointEii
+   fun:_ZN7WebCore15GraphicsContext8drawTextERKNS_4FontERKNS_7TextRunERKNS_10FloatPointEii
+   fun:_ZN7WebCoreL20paintTextWithShadowsEPNS_15GraphicsContextERKNS_4FontERKNS_7TextRunERKN3WTF12AtomicStringEiiiiRKNS_10FloatPointERKNS_9FloatRectEPKNS_10ShadowDataEbb
+   fun:_ZN7WebCore13InlineTextBox5paintERNS_9PaintInfoERKNS_8IntPointEii
+   fun:_ZN7WebCore13InlineFlowBox5paintERNS_9PaintInfoERKNS_8IntPointEii
+   fun:_ZN7WebCore13RootInlineBox5paintERNS_9PaintInfoERKNS_8IntPointEii
+   fun:_ZNK7WebCore17RenderLineBoxList5paintEPNS_20RenderBoxModelObjectERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock13paintContentsERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock11paintObjectERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock5paintERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock13paintChildrenERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock13paintContentsERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock11paintObjectERNS_9PaintInfoERKNS_8IntPointE
+   fun:_ZN7WebCore11RenderBlock5paintERNS_9PaintInfoERKNS_8IntPointE
+ }