gpu: Move buffer format to target texture map into gpu host.

gpu/ipc/host/gpu_memory_buffer_support.h

Index: gpu/ipc/host/gpu_memory_buffer_support.h
diff --git a/gpu/ipc/host/gpu_memory_buffer_support.h b/gpu/ipc/host/gpu_memory_buffer_support.h
index 8dff0f6f3032f67b8abe5bfbf6e0a5a91da010da..14d396f527d169eee425b0f2d8fc538faa77fc17 100644
--- a/gpu/ipc/host/gpu_memory_buffer_support.h
+++ b/gpu/ipc/host/gpu_memory_buffer_support.h
@@ -37,6 +37,10 @@ bool AreNativeGpuMemoryBuffersEnabled();
 // Returns the set of supported configurations.
 GpuMemoryBufferConfigurationSet GetNativeGpuMemoryBufferConfigurations();
 
+// Returns the OpenGL target to use for image textures.
+uint32_t GetImageTextureTarget(gfx::BufferFormat format,
+                               gfx::BufferUsage usage);
+
 }  // namespace gpu
 
 #endif  // GPU_IPC_HOST_GPU_MEMORY_BUFFER_SUPPORT_H_