Update from https://crrev.com/327068

tools/valgrind/drmemory/suppressions_full.txt

Index: tools/valgrind/drmemory/suppressions_full.txt
diff --git a/tools/valgrind/drmemory/suppressions_full.txt b/tools/valgrind/drmemory/suppressions_full.txt
index 81fcb3103378effc015b93c9e728160aa7419f38..b48c19946bf6cc086fab9a0d85968d62affcab74 100644
--- a/tools/valgrind/drmemory/suppressions_full.txt
+++ b/tools/valgrind/drmemory/suppressions_full.txt
@@ -1916,10 +1916,36 @@ name=bug_468169
 *!encode_nonrd_sb_row
 *!vp9_encode_tile
 
+UNADDRESSABLE ACCESS
+name=bug_470055
+blink_web.dll!blink::*::focused*Frame
+blink_web.dll!blink::WebFrameWidgetImpl::selectionBounds
+content.dll!content::RenderWidget::UpdateSelectionBounds
+content.dll!content::RenderWidget::willBeginCompositorFrame
+
 UNINITIALIZED READ
-name=bug_468638
-*!egl::ConfigSorter::operator()
-*!std::_Insertion_sort1<>
-*!std::_Sort<>
-*!egl::ConfigSet::filter
-*!ConfigSetTest_*_BitSizes_Test::TestBody
+name=bug_470848
+blink_platform.dll!blink::Heap::RegionTree::lookup
+*!testing::internal::HandleExceptionsInMethodIfSupported<>
+
+HANDLE LEAK
+name=https://crbug.com/480741
+system call NtDuplicateObject
+KERNELBASE.dll!DuplicateHandle
+KERNEL32.dll!DuplicateHandle
+base.dll!base::SharedMemory::ShareToProcessCommon
+gl_wrapper.dll!gfx::GLImageSharedMemory::Initialize
+content.dll!content::GpuChannel::CreateImageForGpuMemoryBuffer
+content.dll!content::GpuCommandBufferStub::OnCreateImage
+
+HANDLE LEAK
+name=https://crbug.com/481305
+system call NtCreateSection
+KERNELBASE.dll!CreateFileMappingW
+base.dll!base::SharedMemory::Create
+base.dll!base::SharedMemory::CreateAnonymous
+content.dll!content::ChildThreadImpl::AllocateSharedMemory
+content.dll!content::RenderThreadImpl::HostAllocateSharedMemoryBuffer
+content.dll!content::RenderThreadImpl::AllocateSharedMemory
+...
+content.dll!content::WebGraphicsContext3DCommandBufferImpl::CreateContext