Add suppressions for multiple bugs.

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or 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 (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 5205 matching lines @@
    fun:_ZN13PluginService10GetPluginsERKN4base8CallbackIFvRKSt6vectorIN6webkit13WebPluginInfoESaIS4_EEEEE
    fun:_ZN8chromeos12_GLOBAL__N_127GViewRequestInterceptorTest5SetUpEv
 }
 {
    bug_103467
    Memcheck:Cond
    fun:_ZNK7WebCore12NamedNodeMap20mappedMapsEquivalentEPKS0_
    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
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
@@ skipping 17 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }