Add Intel DRM backed GpuMemoryBuffer implementation.

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index e5492e1cd8c24e976abff15c8b0b3b187b53f47d..dfe6f9a5ac4f165820bd5e8fe5671b911003e52b 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -91,6 +91,9 @@
 #include "content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.h"
 #include "media/base/android/webaudio_media_codec_bridge.h"
 #endif
+#if defined(OS_LINUX)
+#include "content/common/gpu/client/gpu_memory_buffer_impl_intel_drm.h"
+#endif
 
 using net::CookieStore;
 
@@ -1321,6 +1324,16 @@ void RenderMessageFilter::OnAllocateGpuMemoryBuffer(
   }
 #endif
 
+#if defined(OS_LINUX)
+  if (GpuMemoryBufferImplIntelDRM::IsFormatSupported(internalformat)) {
+    if (GpuMemoryBufferImplIntelDRM::AllocateBufferObject(
+            gfx::Size(width, height), internalformat, &handle->handle)) {
+      handle->type = gfx::INTEL_DRM_BUFFER;
+      return;
+    }
+  }
+#endif
+
   uint64 stride = static_cast<uint64>(width) *
       GpuMemoryBufferImpl::BytesPerPixel(internalformat);
   if (stride > std::numeric_limits<uint32>::max()) {