Change BufferManager::RequestBufferAccess signatures to avoid sprintfs.

gpu/command_buffer/service/buffer_manager.h

Index: gpu/command_buffer/service/buffer_manager.h
diff --git a/gpu/command_buffer/service/buffer_manager.h b/gpu/command_buffer/service/buffer_manager.h
index 2778a7328b97d001fc4a486af12fd67cd2f682f6..31683bdc2ef6360cb0117e713b24da45d2000351 100644
--- a/gpu/command_buffer/service/buffer_manager.h
+++ b/gpu/command_buffer/service/buffer_manager.h
@@ -5,6 +5,7 @@
 #ifndef GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
 
+#include <stdarg.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ -318,14 +319,14 @@ class GPU_EXPORT BufferManager : public base::trace_event::MemoryDumpProvider {
   bool RequestBufferAccess(ErrorState* error_state,
                            Buffer* buffer,
                            const char* func_name,
-                           const char* message_tag);
+                           const char* error_message_format, ...);
   // Generates INVALID_OPERATION if offset + size is out of range.
   bool RequestBufferAccess(ErrorState* error_state,
                            Buffer* buffer,
                            GLintptr offset,
                            GLsizeiptr size,
                            const char* func_name,
-                           const char* message_tag);
+                           const char* error_message);
   // Returns false and generates INVALID_OPERATION if buffer at binding |ii|
   // doesn't exist, is mapped, or smaller than |variable_sizes[ii]| * |count|.
   // Return true otherwise.
@@ -394,6 +395,14 @@ class GPU_EXPORT BufferManager : public base::trace_event::MemoryDumpProvider {
   void IncreaseMappedBufferCount();
   void DecreaseMappedBufferCount();
 
+  // Same as public RequestBufferAccess taking similar arguments, but
+  // allows caller to assemble the va_list.
+  bool RequestBufferAccessV(ErrorState* error_state,
+                            Buffer* buffer,
+                            const char* func_name,
+                            const char* error_message_format,
+                            va_list varargs);
+
   std::unique_ptr<MemoryTypeTracker> memory_type_tracker_;
   MemoryTracker* memory_tracker_;
   scoped_refptr<FeatureInfo> feature_info_;