Add suppressions for multiple bugs.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 110276)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -5223,6 +5223,32 @@
    fun:_ZNK7WebCore16CSSStyleSelector24canShareStyleWithElementEPNS_4NodeE
    fun:_ZNK7WebCore16CSSStyleSelector26findSiblingForStyleSharingEPNS_4NodeERj
 }
+{
+   bug_104029
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN8chromeos15BalloonView*
+   ...
+   fun:_ZN8chromeos21BalloonCollectionImpl*
+}
+{
+   bug_104447
+   Memcheck:Leak
+   ...
+   fun:HB_OpenTypeShape
+   fun:arabicSyriacOpenTypeShape
+   fun:HB_ArabicShape
+   fun:HB_ShapeItem
+   fun:_ZN7WebCore21ComplexTextController11shapeGlyphsEv
+   fun:_ZN7WebCore21ComplexTextController13nextScriptRunEv
+   fun:_ZN7WebCore21ComplexTextController14widthOfFullRunEv
+   fun:_ZNK7WebCore4Font24floatWidthForComplexTextERKNS_7TextRunEPN3WTF7HashSetIPKNS_14SimpleFontDataENS4_7PtrHashIS8_EENS4_10HashTraitsIS8_EEEEPNS_13GlyphOverflowE
+   fun:_ZNK7WebCore4Font5widthERKNS_7TextRunERiRN3WTF6StringE
+   fun:_ZN7WebCore14SVGTextMetricsC1EPNS_19RenderSVGInlineTextERKNS_7TextRunE
+   fun:_ZN7WebCore14SVGTextMetrics21measureCharacterRangeEPNS_19RenderSVGInlineTextEjj
+   fun:_ZNK7WebCore30SVGTextLayoutAttributesBuilder25propagateLayoutAttributesEPNS_12RenderObjectERN3WTF6VectorINS_23SVGTextLayoutAttributesELm0EEERjRt
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations