Add initial GpuMemoryBufferSurfaceTexture implementation.

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index 497858a38784b8559f4d27649b5762f795548cf3..c436fa74429a441b132a5f12ab7430809a2cd52a 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -870,6 +870,15 @@ void GpuCommandBufferStub::OnRegisterGpuMemoryBuffer(
     uint32 height,
     uint32 internalformat) {
   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnRegisterGpuMemoryBuffer");
+#if defined(OS_ANDROID)
+  // Verify that renderer is not trying to use a surface texture it doesn't own.
+  if (gpu_memory_buffer.type == gfx::SURFACE_TEXTURE_BUFFER &&
+      gpu_memory_buffer.surface_texture_id.secondary_id !=
+          channel()->renderer_pid()) {
+    LOG(ERROR) << "Illegal surface texture ID for renderer.";
+    return;
+  }
+#endif
   if (gpu_control_) {
     gpu_control_->RegisterGpuMemoryBuffer(id,
                                           gpu_memory_buffer,