base: have ToJavaArrayOfByteArray take const vectors.

The string-based version of this function takes const inputs, but the
vector-based one did not. Align them so that the vector-based function
is more general.

Change-Id: I25ee663cc1d35fa9b0bb6cffc33dd0cd8b460423
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404067Reviewed-by: Richard Coles <torne@chromium.org>
Commit-Queue: Adam Langley <agl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806720}

base/android/jni_array.cc

@@ -164,7 +164,7 @@ ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
 
 ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
     JNIEnv* env,
-    base::span<std::vector<uint8_t>> v) {
+    base::span<const std::vector<uint8_t>> v) {
   ScopedJavaLocalRef<jclass> byte_array_clazz = GetClass(env, "[B");
   jobjectArray joa =
       env->NewObjectArray(v.size(), byte_array_clazz.obj(), nullptr);

base/android/jni_array.h

@@ -77,7 +77,7 @@ BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
 
 BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
     JNIEnv* env,
-    base::span<std::vector<uint8_t>> v);
+    base::span<const std::vector<uint8_t>> v);
 
 BASE_EXPORT ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
     JNIEnv* env,