Make javac invocations incremental when possible

build/android/gyp/util/build_utils.py

Index: build/android/gyp/util/build_utils.py
diff --git a/build/android/gyp/util/build_utils.py b/build/android/gyp/util/build_utils.py
index 4e8f13378500567c0769cc143fb9f88792d1ac61..96136707ff262c40c6fb913165d7d2b5b5e6d13a 100644
--- a/build/android/gyp/util/build_utils.py
+++ b/build/android/gyp/util/build_utils.py
@@ -196,7 +196,8 @@ def CheckZipPath(name):
     raise Exception('Absolute zip path: %s' % name)
 
 
-def ExtractAll(zip_path, path=None, no_clobber=True, pattern=None):
+def ExtractAll(zip_path, path=None, no_clobber=True, pattern=None,
+               predicate=None):
   if path is None:
     path = os.getcwd()
   elif not os.path.exists(path):
@@ -209,6 +210,8 @@ def ExtractAll(zip_path, path=None, no_clobber=True, pattern=None):
       if pattern is not None:
         if not fnmatch.fnmatch(name, pattern):
           continue
+      if predicate is not None and not predicate(name):

[jbudorick, 2015/09/23 00:26:20]

I don't think functions can be interpreted as false, so I think this would be
fine as

  if predicate and not predicate(name):

[agrieve, 2015/09/23 02:07:56]

Done.

+        continue
       CheckZipPath(name)
       if no_clobber:
         output_path = os.path.join(path, name)
@@ -403,7 +406,8 @@ def ExpandFileArgs(args):
 
 
 def CallAndRecordIfStale(function, options, record_path=None, input_paths=None,
-                         input_strings=None, output_paths=None, force=False):
+                         input_strings=None, output_paths=None, force=False,
+                         pass_changes=False):
   """Wraps md5_check.CallAndRecordIfStale() and also writes dep & stamp files.
 
   Depfiles and stamp files are automatically added to output_paths when present
@@ -427,8 +431,9 @@ def CallAndRecordIfStale(function, options, record_path=None, input_paths=None,
   if stamp_file:
     output_paths += [stamp_file]
 
-  def on_stale_md5():
-    function()
+  def on_stale_md5(changes):
+    args = (changes,) if pass_changes else ()
+    function(*args)
     if python_deps is not None:
       WriteDepfile(options.depfile, python_deps + input_paths)
     if stamp_file:
@@ -440,5 +445,6 @@ def CallAndRecordIfStale(function, options, record_path=None, input_paths=None,
       input_paths=input_paths,
       input_strings=input_strings,
       output_paths=output_paths,
-      force=force)
+      force=force,
+      pass_changes=True)