Android: Free GLHelper context ashmem when it makes sense

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 0a6770415584f897786603e69dc4788471fb0738..4308280e3151190f271685bba9b3893d7945d94d 100644
--- a/content/common/gpu/client/context_provider_command_buffer.cc
+++ b/content/common/gpu/client/context_provider_command_buffer.cc
@@ -119,6 +119,11 @@ uint32_t ContextProviderCommandBuffer::GetCopyTextureInternalFormat() {
   return GL_RGB;
 }
 
+void ContextProviderCommandBuffer::FreeUnusedSharedMemory() {
+  if (bind_succeeded_)
+    gles2_impl_->FreeUnusedSharedMemory();
+}
+
 bool ContextProviderCommandBuffer::BindToCurrentThread() {
   // This is called on the thread the context will be used.
   DCHECK(context_thread_checker_.CalledOnValidThread());