Fix memory dumping for command buffers with no gr_context_.

content/common/gpu/client/context_provider_command_buffer.cc

Index: content/common/gpu/client/context_provider_command_buffer.cc
diff --git a/content/common/gpu/client/context_provider_command_buffer.cc b/content/common/gpu/client/context_provider_command_buffer.cc
index 5aa148499e85420e87f71fbd67564b31e9b39e94..74756be6c0076b3615da4d59aa6a234c6c6bb827 100644
--- a/content/common/gpu/client/context_provider_command_buffer.cc
+++ b/content/common/gpu/client/context_provider_command_buffer.cc
@@ -447,8 +447,6 @@ bool ContextProviderCommandBuffer::OnMemoryDump(
     const base::trace_event::MemoryDumpArgs& args,
     base::trace_event::ProcessMemoryDump* pmd) {
   DCHECK(bind_succeeded_);
-  if (!gr_context_)
-    return false;
 
   base::Optional<base::AutoLock> hold;
   if (support_locking_)
@@ -457,11 +455,13 @@ bool ContextProviderCommandBuffer::OnMemoryDump(
   gles2_impl_->OnMemoryDump(args, pmd);
   gles2_helper_->OnMemoryDump(args, pmd);
 
-  context_thread_checker_.DetachFromThread();
-  SkiaGpuTraceMemoryDump trace_memory_dump(
-      pmd, gles2_impl_->ShareGroupTracingGUID());
-  gr_context_->get()->dumpMemoryStatistics(&trace_memory_dump);
-  context_thread_checker_.DetachFromThread();
+  if (gr_context_) {
+    context_thread_checker_.DetachFromThread();
+    SkiaGpuTraceMemoryDump trace_memory_dump(
+        pmd, gles2_impl_->ShareGroupTracingGUID());
+    gr_context_->get()->dumpMemoryStatistics(&trace_memory_dump);
+    context_thread_checker_.DetachFromThread();
+  }
   return true;
 }