Android: Add chrome-specific dynamic linker.

content/app/android/library_loader_hooks.cc

Index: content/app/android/library_loader_hooks.cc
diff --git a/content/app/android/library_loader_hooks.cc b/content/app/android/library_loader_hooks.cc
index 48e36e3419fc5ba4533f34ed9a2bd00de5dd3599..074de12ec6f6234c488d5592bfc1acddece18102 100644
--- a/content/app/android/library_loader_hooks.cc
+++ b/content/app/android/library_loader_hooks.cc
@@ -14,6 +14,7 @@
 #include "base/debug/trace_event.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
+#include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/tracked_objects.h"
 #include "content/app/android/app_jni_registrar.h"
@@ -107,6 +108,17 @@ static jint LibraryLoaded(JNIEnv* env, jclass clazz,
   return 0;
 }
 
+static void RecordContentAndroidLinkerHistogram(
+    JNIEnv* env,
+    jclass clazz,
+    jboolean loaded_at_fixed_address_failed,
+    jboolean is_low_memory_device) {
+  UMA_HISTOGRAM_BOOLEAN("ContentAndroidLinker.LoadedAtFixedAddressFailed",
+                        loaded_at_fixed_address_failed);
+  UMA_HISTOGRAM_BOOLEAN("ContentAndroidLinker.IsLowMemoryDevice",
+                        is_low_memory_device);
+}
+
 void LibraryLoaderExitHook() {
   if (g_at_exit_manager) {
     delete g_at_exit_manager;