Add Intel DRM backed GpuMemoryBuffer implementation.

content/browser/gpu/browser_gpu_channel_host_factory.cc

Index: content/browser/gpu/browser_gpu_channel_host_factory.cc
diff --git a/content/browser/gpu/browser_gpu_channel_host_factory.cc b/content/browser/gpu/browser_gpu_channel_host_factory.cc
index 55d59dfc4fcc5663d5983ac6773568badd883ea6..0c25ff3b36a2bab06df7fca2b7537623a3e1a80e 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.cc
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.cc
@@ -18,6 +18,11 @@
 #include "content/public/common/content_client.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 
+#if defined(OS_LINUX)
+#include "content/common/gpu/client/gpu_memory_buffer_impl_intel_drm.h"
+#include "ui/gl/gl_implementation.h"
+#endif
+
 namespace content {
 
 BrowserGpuChannelHostFactory* BrowserGpuChannelHostFactory::instance_ = NULL;
@@ -382,6 +387,28 @@ scoped_ptr<gfx::GpuMemoryBuffer>
   if (!GpuMemoryBufferImpl::IsFormatValid(internalformat))
     return scoped_ptr<gfx::GpuMemoryBuffer>();
 
+#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)) {
+    drm_intel_bo* buffer_object =
+        GpuMemoryBufferImplIntelDRM::CreateBufferObject(
+            gfx::Size(width, height), internalformat);
+    if (buffer_object) {
+      scoped_ptr<GpuMemoryBufferImplIntelDRM> buffer(
+          new GpuMemoryBufferImplIntelDRM(gfx::Size(width, height),
+                                          internalformat));
+      if (buffer->InitializeFromBufferObject(buffer_object))
+        return buffer.PassAs<gfx::GpuMemoryBuffer>();
+    }
+  }
+#endif
+
   size_t size = width * height *
       GpuMemoryBufferImpl::BytesPerPixel(internalformat);
   scoped_ptr<base::SharedMemory> shm(new base::SharedMemory());