Only dlopen() OMX/VAAPI libs in the GPU process, and only lazily dlsym() their symbols.

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 75ab303c9e248c5c8ea915ad6056f7699bae83a5..be583047eba9bc3f51e3f6329094e067907564fc 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -30,6 +30,10 @@
 #if defined(OS_WIN)
 #include "content/common/gpu/media/dxva_video_decode_accelerator.h"
 #include "sandbox/win/src/sandbox.h"
+#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
+#include "content/common/gpu/media/omx_video_decode_accelerator.h"
+#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
+#include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #endif
 
 #if defined(USE_X11)
@@ -149,6 +153,12 @@ int GpuMain(const content::MainFunctionParams& parameters) {
     TRACE_EVENT0("gpu", "Initialize sandbox");
     bool do_init_sandbox = true;
 
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
+    OmxVideoDecodeAccelerator::PreSandboxInitialization();
+#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
+    VaapiVideoDecodeAccelerator::PreSandboxInitialization();
+#endif
+
 #if defined(OS_CHROMEOS) && defined(NDEBUG)
     // On Chrome OS and when not on a debug build, initialize
     // the GPU process' sandbox only for Intel GPUs.