Refactor for GPU command buffer PUTSTR code generator.

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index 193fbb82e9c51c506dd1ecb1d189c9625151c6a1..45bc73b3b82cf0bdfbbfe21784a226d3d1dbc703 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -625,6 +625,13 @@ class GLES2_IMPL_EXPORT GLES2Implementation
       GLuint buffer_id,
       const char* function_name, GLuint offset, GLsizei size);
 
+  // Pack 2D arrays of char into a bucket.
+  // Helper function for ShaderSource(), TransformFeedbackVaryings(), etc.
+  bool PackStringsToBucket(GLsizei count,
+                           const char* const* str,
+                           const GLint* length,
+                           const char* func_name);
+
   const std::string& GetLogPrefix() const;
 
 #if defined(GL_CLIENT_FAIL_GL_ERRORS)