Remove underscores from mode identifiers.

dm/DMPipeTask.cpp

 #include "DMPipeTask.h"
 #include "DMUtil.h"
 #include "DMWriteTask.h"
 
 #include "SamplePipeControllers.h"
 #include "SkCommandLineFlags.h"
 #include "SkGPipe.h"
 
 DEFINE_bool(pipe, true, "If true, check several pipe variants against the reference bitmap.");
 
 namespace DM {
 
 static uint32_t get_flags(PipeTask::Mode mode) {
     uint32_t flags = 0;
     if (mode != PipeTask::kInProcess_Mode) {
         flags |= SkGPipeWriter::kCrossProcess_Flag;
     }
     if (mode == PipeTask::kSharedAddress_Mode) {
         flags |= SkGPipeWriter::kSharedAddressSpace_Flag;
     }
     return flags;
 }
 
 static const char* get_name(const uint32_t flags) {
     if (flags & SkGPipeWriter::kCrossProcess_Flag &&
         flags & SkGPipeWriter::kSharedAddressSpace_Flag) {
-        return "shared_address_space_pipe";
+        return "shared-address-space-pipe";
     } else if (flags & SkGPipeWriter::kCrossProcess_Flag) {
-        return "cross_process_pipe";
+        return "cross-process-pipe";
     } else {
         return "pipe";
     }
 }
 
 PipeTask::PipeTask(const Task& parent,
                    skiagm::GM* gm,
                    SkBitmap reference,
                    Mode mode)
     : CpuTask(parent)
@@ skipping 34 matching lines @@
         return true;
     }
     if (fFlags == SkGPipeWriter::kCrossProcess_Flag &&
         fGM->getFlags() & skiagm::GM::kSkipPipeCrossProcess_Flag) {
         return true;
     }
     return false;
 }
 
 }  // namespace DM