supersize: Make Disassemble() work for downloaded .size files

tools/binary_size/libsupersize/models.py

Index: tools/binary_size/libsupersize/models.py
diff --git a/tools/binary_size/libsupersize/models.py b/tools/binary_size/libsupersize/models.py
index 31d01e59d942b7b3c2eb3e29802e4b37240b0d15..88716dadf38d98463dade12e8812ddac4fcc8ff7 100644
--- a/tools/binary_size/libsupersize/models.py
+++ b/tools/binary_size/libsupersize/models.py
@@ -42,6 +42,7 @@ METADATA_ELF_FILENAME = 'elf_file_name'  # Path relative to output_directory.
 METADATA_ELF_MTIME = 'elf_mtime'  # int timestamp in utc.
 METADATA_ELF_BUILD_ID = 'elf_build_id'
 METADATA_GN_ARGS = 'gn_args'
+METADATA_TOOL_PREFIX = 'tool_prefix'  # Path relative to SRC_ROOT.
 
 
 SECTION_TO_SECTION_NAME = {
@@ -456,9 +457,12 @@ class SymbolGroup(BaseSymbol):
                                    filtered_symbols=filtered_and_kept[0],
                                    section_name=self.section_name)
 
-  def WhereBiggerThan(self, min_size):
+  def WhereSizeBiggerThan(self, min_size):
     return self.Filter(lambda s: s.size >= min_size)
 
+  def WherePssBiggerThan(self, min_pss):
+    return self.Filter(lambda s: s.pss >= min_pss)
+
   def WhereInSection(self, section):
     if len(section) == 1:
       ret = self.Filter(lambda s: s.section == section)