Suppress an uninitialized condition in HttpStreamFactoryImpl

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 # running overnight and removing outdated bugs/suppressions.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 6548 matching lines @@
    fun:_ZN7WebCore18RenderLayerBacking*GraphicsLayer*
 }
 {
    bug_173356
    Memcheck:Overlap
    fun:memcpy
    fun:_ZN3gpu5gles2*Immediate4InitE*
    fun:_ZN3gpu5gles2*GLES2ImplementationTest_*_Test8TestBodyEv
 }
 {
-bug_173597_a
-Memcheck:Leak
-fun:malloc
-fun:g_malloc
-fun:g_slice_alloc
-fun:pango_attr_list_get_iterator
-fun:_ZN3gfx35RenderTextTest_PangoAttributes_Test8TestBodyEv
+   bug_173597_a
+   Memcheck:Leak
+   fun:malloc
+   fun:g_malloc
+   fun:g_slice_alloc
+   fun:pango_attr_list_get_iterator
+   fun:_ZN3gfx35RenderTextTest_PangoAttributes_Test8TestBodyEv
 }
 {
-bug_173597_b
-Memcheck:Leak
-fun:realloc
-fun:g_realloc
-fun:g_string_maybe_expand
-fun:g_string_insert_len
-fun:pango_font_description_to_string
-fun:_ZN3gfx35RenderTextTest_PangoAttributes_Test8TestBodyEv
+   bug_173597_b
+   Memcheck:Leak
+   fun:realloc
+   fun:g_realloc
+   fun:g_string_maybe_expand
+   fun:g_string_insert_len
+   fun:pango_font_description_to_string
+   fun:_ZN3gfx35RenderTextTest_PangoAttributes_Test8TestBodyEv
 }
+{
+   bug_173620
+   Memcheck:Uninitialized
+   fun:_ZNK3net21HttpStreamFactoryImpl30GetAlternateProtocolRequestForERK4GURLPS1_
+   fun:_ZN3net21HttpStreamFactoryImpl13RequestStreamERKNS_15HttpRequestInfoERKNS_9SSLConfigES6_PNS_17HttpStreamRequest8DelegateERKNS_11BoundNetLogE
+   fun:_ZN3net22HttpNetworkTransaction14DoCreateStreamEv
+   fun:_ZN3net22HttpNetworkTransaction6DoLoopEi
+   fun:_ZN3net22HttpNetworkTransaction5StartEPKNS_15HttpRequestInfoERKN4base8CallbackIFviEEERKNS_11BoundNetLogE
+   fun:_ZN3net12_GLOBAL__N_126GroupNameTransactionHelperERKSsRK13scoped_refptrINS_18HttpNetworkSessionEE
+   fun:_ZN3net66HttpNetworkTransactionSpdy*Test_GroupNameForDirectConnections_Test8TestBodyEv
+}