Update from https://crrev.com/306901

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 # running overnight and removing outdated bugs/suppressions.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 2394 matching lines @@
    fun:_ZNSt8_Rb_treeIN3net12HostPortPairESt4pairIKS1_St3mapINS0_15SpdySettingsIdsES2_INS0_17SpdySettingsFlagsEjESt4lessIS5_ESaIS2_IKS5_S7_EEEESt10_Select1stISE_ES8_IS1_ESaISE_EE11_M_get_nodeEv
    fun:_ZNSt8_Rb_treeIN3net12HostPortPairESt4pairIKS1_St3mapINS0_15SpdySettingsIdsES2_INS0_17SpdySettingsFlagsEjESt4lessIS5_ESaIS2_IKS5_S7_EEEESt10_Select1stISE_ES8_IS1_ESaISE_EE14_M_create_nodeERKSE_
    fun:_ZNSt8_Rb_treeIN3net12HostPortPairESt4pairIKS1_St3mapINS0_15SpdySettingsIdsES2_INS0_17SpdySettingsFlagsEjESt4lessIS5_ESaIS2_IKS5_S7_EEEESt10_Select1stISE_ES8_IS1_ESaISE_EE13_M_clone_nodeEPKSt13_Rb_tree_nodeISE_E
    fun:_ZNSt8_Rb_treeIN3net12HostPortPairESt4pairIKS1_St3mapINS0_15SpdySettingsIdsES2_INS0_17SpdySettingsFlagsEjESt4lessIS5_ESaIS2_IKS5_S7_EEEESt10_Select1stISE_ES8_IS1_ESaISE_EE7_M_copyEPKSt13_Rb_tree_nodeISE_EPSL_
    fun:_ZNSt8_Rb_treeIN3net12HostPortPairESt4pairIKS1_St3mapINS0_15SpdySettingsIdsES2_INS0_17SpdySettingsFlagsEjESt4lessIS5_ESaIS2_IKS5_S7_EEEESt10_Select1stISE_ES8_IS1_ESaISE_EEaSERKSJ_
    fun:_ZNSt3mapIN3net12HostPortPairES_INS0_15SpdySettingsIdsESt4pairINS0_17SpdySettingsFlagsEjESt4lessIS2_ESaIS3_IKS2_S5_EEES6_IS1_ESaIS3_IKS1_SB_EEEaSERKSG_
    fun:_ZN18chrome_browser_net27HttpServerPropertiesManager24UpdatePrefsFromCacheOnIOERKN4base8CallbackIFvvEEE
    fun:_ZN18chrome_browser_net27HttpServerPropertiesManager24UpdatePrefsFromCacheOnIOEv
 }
 {
+   bug_290407
+   Memcheck:Leak
+   fun:calloc
+   fun:_swrast_new_soft_renderbuffer
+   fun:_mesa_BindRenderbufferEXT
+   fun:shared_dispatch_stub_939
+   fun:_ZN3gfx9GLApiBase23glBindRenderbufferEXTFnEjj
+   fun:_ZN3gpu5gles216GLES2DecoderImpl18DoBindRenderbufferEjj
+}
+{
    bug_293024_b
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF10fastMallocEm
    fun:_ZN3WTF24ThreadSafeRefCountedBasenwEm
    fun:_ZN5blink12_GLOBAL__N_131AllowFileSystemMainThreadBridge6createEPN7blink17WorkerGlobalScopeEPNS_13WebWorkerBaseERKN3WTF6StringE
    fun:_ZN5blink22WorkerFileSystemClient15allowFileSystem*
    ...
    fun:_ZN2v88internal25FunctionCallbackArguments4CallEPFvRKNS_20FunctionCallbackInfoINS_5ValueEEEE
 }
@@ skipping 945 matching lines @@
    fun:_ZN5blink13InlineFlowBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
 }
 {
    bug_422485
    Memcheck:Overlap
    fun:memcpy@@GLIBC_2.14
    fun:_ZNK8SkBitmap12copyPixelsToEPvmmb
    fun:_ZN5blink19ImageFrameGenerator14decodeAndScaleERK11SkImageInfomPvm
    fun:_ZN5blink22DecodingImageGenerator11onGetPixelsERK11SkImageInfoPvmPjPi
    fun:_ZN16SkImageGenerator9getPixelsERK11SkImageInfoPvmPjPi
-   ...
-   fun:_ZNK6SkDraw10drawBitmapERK8SkBitmapRK8SkMatrixRK7SkPaint
 }
 {
    bug_424056a
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF13CStringBuffer19createUninitializedEm
    fun:_ZN3WTF7CString16newUninitializedEmRPc
    fun:_ZN3WTF15TextCodecLatin112encodeCommonIhEENS_7CStringEPKT_mNS_19UnencodableHandlingE
    fun:_ZN3WTF15TextCodecLatin16encodeEPKhmNS_19UnencodableHandlingE
 }
@@ skipping 126 matching lines @@
    fun:_ZN7content28BrowserGpuChannelHostFactory16EstablishRequest12FinishOnMainEv
 }
 {
    Expected_leak_due_to_gpu_thread_leaked_by_lazy_instance
    Memcheck:Leak
    fun:calloc
    fun:pthread_setspecific
    ...
    fun:_ZN3gpu22InProcessCommandBuffer21InitializeOnGpuThreadERKNS0_27InitializeOnGpuThreadParamsE
 }