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..5d9cd920954ba2f18f18503f14d6f67cd1d577a2 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -91,6 +91,10 @@
 #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"
+#include "ui/gl/gl_implementation.h"
+#endif
 
 using net::CookieStore;
 
@@ -1260,6 +1264,23 @@ void RenderMessageFilter::OnAllocateGpuMemoryBuffer(
     return;
   }
 
+#if defined(OS_LINUX)
+  // Intel DRM implementation of gpu memory buffer is limited to EGLGLES2 as we
+  // currently depend on EGL_EXT_image_dma_buf_import to use this type of buffer
+  // on the GPU side.
+  bool is_gl_implementation_supported_by_intel_drm =
+      gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2;
+
+  if (is_gl_implementation_supported_by_intel_drm &&
+      GpuMemoryBufferImplIntelDRM::IsFormatSupported(internalformat)) {
+    if (GpuMemoryBufferImplIntelDRM::AllocateBufferObject(
+            gfx::Size(width, height), internalformat, &handle->handle)) {
+      handle->type = gfx::INTEL_DRM_BUFFER;
+      return;
+    }
+  }
+#endif
+
 #if defined(OS_MACOSX)
   if (GpuMemoryBufferImplIOSurface::IsFormatSupported(internalformat)) {
     IOSurfaceSupport* io_surface_support = IOSurfaceSupport::Initialize();