Support content scheme uri for Chrome on Android

base/android/content_uri_utils.h

Index: base/android/content_uri_utils.h
diff --git a/base/android/content_uri_utils.h b/base/android/content_uri_utils.h
index 827ec92fa393c3cf58bb569b0bfcd5d6fb470775..e66b77077e1af4ad39b26cb8e90b1d0b5a2dc1b3 100644
--- a/base/android/content_uri_utils.h
+++ b/base/android/content_uri_utils.h
@@ -16,13 +16,17 @@ namespace base {
 
 bool RegisterContentUriUtils(JNIEnv* env);
 
-// Opens a content uri for read and returns the file descriptor to the caller.
-// Returns -1 if the uri is invalid.
+// Opens a content URI for read and returns the file descriptor to the caller.
+// Returns -1 if the URI is invalid.
 BASE_EXPORT File OpenContentUriForRead(const FilePath& content_uri);
 
-// Check whether a content uri exists.
+// Check whether a content URI exists.
 BASE_EXPORT bool ContentUriExists(const FilePath& content_uri);
 
+// Gets MIME type from a content URI. Returns an empty string if the URI is
+// invalid.
+BASE_EXPORT std::string GetContentUriMimeType(const FilePath& content_uri);
+
 }  // namespace base
 
 #endif  // BASE_ANDROID_CONTENT_URI_UTILS_H_