Add generated and hand-written passthrough command handlers with stub Doers.

gpu/command_buffer/service/common_decoder.cc

Index: gpu/command_buffer/service/common_decoder.cc
diff --git a/gpu/command_buffer/service/common_decoder.cc b/gpu/command_buffer/service/common_decoder.cc
index 27ba05b2482af7cd89d3d36440bd97440a23508b..634932102314e1d5ee38075b29ab5ed9b03e6fa5 100644
--- a/gpu/command_buffer/service/common_decoder.cc
+++ b/gpu/command_buffer/service/common_decoder.cc
@@ -137,6 +137,25 @@ void* CommonDecoder::GetAddressAndCheckSize(unsigned int shm_id,
   return buffer->GetDataAddress(data_offset, data_size);
 }
 
+void* CommonDecoder::GetAddressAndSize(unsigned int shm_id,
+                                       unsigned int data_offset,
+                                       unsigned int* data_size) {
+  CHECK(engine_);
+  scoped_refptr<gpu::Buffer> buffer = engine_->GetSharedMemoryBuffer(shm_id);
+  if (!buffer.get())
+    return NULL;
+  return buffer->GetDataAddressAndSize(data_offset, data_size);
+}
+
+unsigned int CommonDecoder::GetSharedMemorySize(unsigned int shm_id,
+                                                unsigned int offset) {
+  CHECK(engine_);
+  scoped_refptr<gpu::Buffer> buffer = engine_->GetSharedMemoryBuffer(shm_id);
+  if (!buffer.get())
+    return 0;
+  return buffer->GetRemainingSize(offset);
+}
+
 scoped_refptr<gpu::Buffer> CommonDecoder::GetSharedMemoryBuffer(
     unsigned int shm_id) {
   return engine_->GetSharedMemoryBuffer(shm_id);