Bug 4016329 do full string comparisons

Use full string comparisons instead of partial for
  file extension and MIME type.
Do case-insensitive comparison of MIME type and file extensions.
Fix error in comment for String8::getPathExtension.
Remove dead code -- StringTokenizer is unused.

Change-Id: I322be6235abbdaab5f7eafa48926dbb2cf46dc29
diff --git a/drm/drmserver/Android.mk b/drm/drmserver/Android.mk
index 5df2ff8..f94f9a3 100644
--- a/drm/drmserver/Android.mk
+++ b/drm/drmserver/Android.mk
@@ -19,8 +19,7 @@
 LOCAL_SRC_FILES:= \
     main_drmserver.cpp \
     DrmManager.cpp \
-    DrmManagerService.cpp \
-    StringTokenizer.cpp
+    DrmManagerService.cpp
 
 LOCAL_SHARED_LIBRARIES := \
     libutils \
diff --git a/drm/drmserver/StringTokenizer.cpp b/drm/drmserver/StringTokenizer.cpp
deleted file mode 100644
index 2130a00..0000000
--- a/drm/drmserver/StringTokenizer.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "StringTokenizer.h"
-
-using namespace android;
-
-StringTokenizer::StringTokenizer(const String8& string, const String8& delimiter) {
-    splitString(string, delimiter);
-}
-
-void StringTokenizer::splitString(const String8& string, const String8& delimiter) {
-    for (unsigned int i = 0; i < string.length(); i++) {
-        unsigned int position = string.find(delimiter.string(), i);
-        if (string.length() != position) {
-            String8 token(string.string()+i, position-i);
-            if (token.length()) {
-                mStringTokenizerVector.push(token);
-                i = position + delimiter.length() - 1;
-            }
-        } else {
-            mStringTokenizerVector.push(String8(string.string()+i, string.length()-i));
-            break;
-        }
-    }
-}
-
-StringTokenizer::Iterator StringTokenizer::iterator() {
-    return Iterator(this);
-}
-
-StringTokenizer::Iterator::Iterator(const StringTokenizer::Iterator& iterator) :
-    mStringTokenizer(iterator.mStringTokenizer),
-    mIndex(iterator.mIndex) {
-}
-
-StringTokenizer::Iterator& StringTokenizer::Iterator::operator=(
-            const StringTokenizer::Iterator& iterator) {
-    mStringTokenizer = iterator.mStringTokenizer;
-    mIndex = iterator.mIndex;
-    return *this;
-}
-
-bool StringTokenizer::Iterator::hasNext() {
-    return mIndex < mStringTokenizer->mStringTokenizerVector.size();
-}
-
-String8& StringTokenizer::Iterator::next() {
-    String8& value = mStringTokenizer->mStringTokenizerVector.editItemAt(mIndex);
-    mIndex++;
-    return value;
-}
-