Command buffer: Fix bugs for drawing when the type of vertex attrib is a packed type

gpu/command_buffer/common/gles2_cmd_utils.h

Index: gpu/command_buffer/common/gles2_cmd_utils.h
diff --git a/gpu/command_buffer/common/gles2_cmd_utils.h b/gpu/command_buffer/common/gles2_cmd_utils.h
index 848abcaea5ed264e3d2c09826ee8a44286fb2e2c..3c302af9bedcfa95e72e8d283c3e4eae25c425c5 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.h
+++ b/gpu/command_buffer/common/gles2_cmd_utils.h
@@ -155,7 +155,9 @@ class GLES2_UTILS_EXPORT GLES2Util {
   // For example, GL_FLOAT_MAT3 returns 9.
   static uint32_t GetElementCountForUniformType(int type);
 
-  static size_t GetGLTypeSizeForTexturesAndBuffers(uint32_t type);
+  static size_t GetGLTypeSizeForBuffers(uint32_t type);
+
+  static size_t GetGroupSizeForBufferType(uint32_t count, uint32_t type);
 
   static size_t GetGLTypeSizeForPathCoordType(uint32_t type);