Steps to repro:
1. Grab a mobile device and go offline (turn off WiFi and Data).
2. Navigate to chrome://crash (to cause a crash and a minidump file to be created). 
3. Look at the naming of the minidump file that represents the crash in 2 after Chrome tries to upload the file (the upload will fail because we are offline). If logcat extraction succeeds the file will be named something like "foo.dmpX.try0.try1" where X is some number:

Initial file name:
foo.dmpX
File name after logcat extraction:
foo.dmpX.try0
File name after failed upload attempt
foo.dmpX.try0.try1

The file name after the failed upload attempt should be foo.dmpX.try1 - the incorrectly named file will now not be picked up by further upload attempts because the file name doesn't match the MINIDUMP_PATTERN "\\.dmp([0-9]*)(\\.try[0-9])?\\z"


The reason for this bug seems to be the numTries > 0 check inside the method filenameWithIncrementedAttemptNumber:

@VisibleForTesting
public static String filenameWithIncrementedAttemptNumber(String filename) {
    int numTried = readAttemptNumber(filename);
    if (numTried > 0) {
        int newCount = numTried + 1;
        return filename.replace(
                UPLOAD_ATTEMPT_DELIMITER + numTried, UPLOAD_ATTEMPT_DELIMITER + newCount);
    } else {
        return filename + UPLOAD_ATTEMPT_DELIMITER + "1";
    }
}

i.e. the filename "foo.dmpX.try0" ->
numTried == 0 ->
return filename + UPLOAD_ATTEMPT_DELIMITER + "1"; // =  foo.dmpX.try0.try1


Note that there is a similar bug in the method filenameWithForcedUploadState:


/**
 * @return The filename to rename to so as to manually force an upload (including clearing any
 *     previous upload attempt history).
 */
@VisibleForTesting
protected static String filenameWithForcedUploadState(String filename) {
    int numTried = readAttemptNumber(filename);
    if (numTried > 0) {
        filename = filename.replace(
                UPLOAD_ATTEMPT_DELIMITER + numTried, UPLOAD_ATTEMPT_DELIMITER + 0);
    }
    filename = filename.replace(UPLOAD_SKIPPED_MINIDUMP_SUFFIX, UPLOAD_FORCED_MINIDUMP_SUFFIX);
    return filename.replace(NOT_YET_UPLOADED_MINIDUMP_SUFFIX, UPLOAD_FORCED_MINIDUMP_SUFFIX);
}