Clean old webview jar/pak files.

The java code and pak files are no longer needed as they are now
included in a WebView APK instead. Delete them from the system image to
reclaim space and prevent confusion.

Bug: 16723226
Change-Id: Ia6a8752fd3cc44032efd39c21fec02c49be9c8af
diff --git a/chromium/CleanSpec.mk b/chromium/CleanSpec.mk
index 221eb31..97ca95d 100644
--- a/chromium/CleanSpec.mk
+++ b/chromium/CleanSpec.mk
@@ -44,6 +44,8 @@
 #$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
 #$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
 $(call add-clean-step, rm -rf $(TARGET_OUT_JAVA_LIBRARIES)/webviewchromium.*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/framework/webview)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/framework/webviewchromium.jar)
 
 # ******************************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST ABOVE THIS BANNER