Remove unused google-common dependency.

We don't actually need google-common and it breaks building in open
source branches where it doesn't exist, so remove the dependency.

Change-Id: Ib8ae9ad748da9d8be46896be67500348f99c616b
diff --git a/chromium/Android.mk b/chromium/Android.mk
index b9adf08..f60bc58 100644
--- a/chromium/Android.mk
+++ b/chromium/Android.mk
@@ -26,8 +26,7 @@
 
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_STATIC_JAVA_LIBRARIES += google-common \
-                               android_webview_java \
+LOCAL_STATIC_JAVA_LIBRARIES += android_webview_java
 
 LOCAL_SRC_FILES := $(call all-java-files-under, java)