gpu: Move native memory buffer configuration into //gpu

gpu/ipc/common/gpu_memory_buffer_support.h

Index: gpu/ipc/common/gpu_memory_buffer_support.h
diff --git a/gpu/ipc/common/gpu_memory_buffer_support.h b/gpu/ipc/common/gpu_memory_buffer_support.h
index 6c32f464503102bbf1d5e1d423d0ffc8399e7dee..8d7791e8b8de838f266a324a3e697ea8dcbaf98f 100644
--- a/gpu/ipc/common/gpu_memory_buffer_support.h
+++ b/gpu/ipc/common/gpu_memory_buffer_support.h
@@ -5,12 +5,37 @@
 #ifndef GPU_IPC_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_
 #define GPU_IPC_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_
 
+#include "base/containers/hash_tables.h"
+#include "base/hash.h"
 #include "gpu/gpu_export.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace gpu {
 
+using GpuMemoryBufferConfigurationKey =
+    std::pair<gfx::BufferFormat, gfx::BufferUsage>;
+using GpuMemoryBufferConfigurationSet =
+    base::hash_set<GpuMemoryBufferConfigurationKey>;
+
+}  // namespace gpu
+
+namespace BASE_HASH_NAMESPACE {
+
+template <>
+struct hash<gpu::GpuMemoryBufferConfigurationKey> {
+  size_t operator()(const gpu::GpuMemoryBufferConfigurationKey& key) const {
+    return base::HashInts(static_cast<int>(key.first),
+                          static_cast<int>(key.second));
+  }
+};
+
+}  // namespace BASE_HASH_NAMESPACE
+
+namespace gpu {
+
+GPU_EXPORT bool AreNativeGpuMemoryBuffersEnabled();
+
 // Returns the native GPU memory buffer factory type. Returns EMPTY_BUFFER
 // type if native buffers are not supported.
 GPU_EXPORT gfx::GpuMemoryBufferType GetNativeGpuMemoryBufferType();
@@ -20,6 +45,10 @@ GPU_EXPORT bool IsNativeGpuMemoryBufferConfigurationSupported(
     gfx::BufferFormat format,
     gfx::BufferUsage usage);
 
+// Returns the set of supported configurations.
+GPU_EXPORT GpuMemoryBufferConfigurationSet
+GetNativeGpuMemoryBufferConfigurations();
+
 }  // namespace gpu
 
 #endif  // GPU_IPC_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_