Add R_8 GPU memory buffers format.

content/common/gpu/gpu_memory_buffer_factory_shared_memory.cc

Index: content/common/gpu/gpu_memory_buffer_factory_shared_memory.cc
diff --git a/content/common/gpu/gpu_memory_buffer_factory_shared_memory.cc b/content/common/gpu/gpu_memory_buffer_factory_shared_memory.cc
index 992decd875d5e06e2637e8a17f9c8ae995d1a8ae..4c8f0e9a4c3caca71e5f4af68a147160fad2d8e2 100644
--- a/content/common/gpu/gpu_memory_buffer_factory_shared_memory.cc
+++ b/content/common/gpu/gpu_memory_buffer_factory_shared_memory.cc
@@ -23,10 +23,10 @@ void GpuMemoryBufferFactorySharedMemory::
     GetSupportedGpuMemoryBufferConfigurations(
         std::vector<Configuration>* configurations) {
   const Configuration supported_configurations[] = {
-    { gfx::GpuMemoryBuffer::RGBA_8888, gfx::GpuMemoryBuffer::MAP },
-    { gfx::GpuMemoryBuffer::BGRA_8888, gfx::GpuMemoryBuffer::MAP },
-    { gfx::GpuMemoryBuffer::YUV_420, gfx::GpuMemoryBuffer::MAP }
-  };
+      {gfx::GpuMemoryBuffer::R_8, gfx::GpuMemoryBuffer::MAP},
+      {gfx::GpuMemoryBuffer::RGBA_8888, gfx::GpuMemoryBuffer::MAP},
+      {gfx::GpuMemoryBuffer::BGRA_8888, gfx::GpuMemoryBuffer::MAP},
+      {gfx::GpuMemoryBuffer::YUV_420, gfx::GpuMemoryBuffer::MAP}};
   configurations->assign(
       supported_configurations,
       supported_configurations + arraysize(supported_configurations));