diff --git a/ipc/glue/GeckoChildProcessHost.cpp b/ipc/glue/GeckoChildProcessHost.cpp
index bd16225320a3..9e319079bd4f 100644
--- a/ipc/glue/GeckoChildProcessHost.cpp
+++ b/ipc/glue/GeckoChildProcessHost.cpp
@@ -37,10 +37,6 @@
 #define NS_TASKBAR_CONTRACTID "@mozilla.org/windows-taskbar;1"
 #endif
 
-#ifdef MOZ_WIDGET_ANDROID
-#include "APKOpen.h"
-#endif
-
 using mozilla::MonitorAutoLock;
 using mozilla::ipc::GeckoChildProcessHost;
 
@@ -560,20 +556,6 @@ GeckoChildProcessHost::PerformAsyncLaunchInternal(std::vector<std::string>& aExt
 #ifdef MOZ_WIDGET_ANDROID
   // The java wrapper unpacks this for us but can't make it executable
   chmod(exePath.value().c_str(), 0700);
-  int cacheCount = 0;
-  const struct lib_cache_info * cache = getLibraryCache();
-  nsCString cacheStr;
-  while (cache &&
-         cacheCount++ < MAX_LIB_CACHE_ENTRIES &&
-         strlen(cache->name)) {
-    mFileMap.push_back(std::pair<int,int>(cache->fd, cache->fd));
-    cacheStr.Append(cache->name);
-    cacheStr.AppendPrintf(":%d;", cache->fd);
-    cache++;
-  }
-  // fill the last arg with something if there's no cache
-  if (cacheStr.IsEmpty())
-    cacheStr.AppendLiteral("-");
 #endif  // MOZ_WIDGET_ANDROID
 
 #ifdef ANDROID
@@ -668,10 +650,6 @@ GeckoChildProcessHost::PerformAsyncLaunchInternal(std::vector<std::string>& aExt
 
   childArgv.push_back(childProcessType);
 
-#ifdef MOZ_WIDGET_ANDROID
-  childArgv.push_back(cacheStr.get());
-#endif
-
   base::LaunchApp(childArgv, mFileMap,
 #if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_BSD)
                   newEnvVars, privs,
diff --git a/mozglue/android/APKOpen.cpp b/mozglue/android/APKOpen.cpp
index a60609481f83..c43a7fbb859f 100644
--- a/mozglue/android/APKOpen.cpp
+++ b/mozglue/android/APKOpen.cpp
@@ -121,14 +121,6 @@ xul_dlsym(const char *symbolName, T *value)
   *value = (T) (uintptr_t) __wrap_dlsym(xul_handle, symbolName);
 }
 
-static struct lib_cache_info *cache_mapping = NULL;
-
-NS_EXPORT const struct lib_cache_info *
-getLibraryCache()
-{
-  return cache_mapping;
-}
-
 static int mapping_count = 0;
 
 #define MAX_MAPPING_INFO 32
@@ -378,9 +370,6 @@ ChildProcessInit(int argc, char* argv[])
     return FAILURE;
   }
 
-  // don't pass the last arg - it's only recognized by the lib cache
-  argc--;
-
   GeckoProcessType (*fXRE_StringToChildProcessType)(char*);
   xul_dlsym("XRE_StringToChildProcessType", &fXRE_StringToChildProcessType);
 
diff --git a/mozglue/android/APKOpen.h b/mozglue/android/APKOpen.h
index 23c407eace6e..dcab69e9f6c6 100644
--- a/mozglue/android/APKOpen.h
+++ b/mozglue/android/APKOpen.h
@@ -24,17 +24,4 @@ static const int SUCCESS = 0;
 static const int FAILURE = 1;
 void JNI_Throw(JNIEnv* jenv, const char* classname, const char* msg);
 
-#define MAX_LIB_CACHE_ENTRIES 32
-#define MAX_LIB_CACHE_NAME_LEN 32
-
-struct lib_cache_info {
-  char name[MAX_LIB_CACHE_NAME_LEN];
-  int fd;
-  uint32_t lib_size;
-  void* buffer;
-};
-
-NS_EXPORT const struct lib_cache_info * getLibraryCache();
-
-
 #endif /* APKOpen_h */