Shorten the Data Saver site breakdown dialog strings

TBR=megjablon@google.com

(cherry picked from commit a3851d4)

Bug: 762091
Change-Id: Ie26464c103d8884d4d82dee0457a39fff52dc58f
Reviewed-on: https://chromium-review.googlesource.com/650946
Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Megan Jablonski <megjablon@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#500028}
Reviewed-on: https://chromium-review.googlesource.com/655179
Reviewed-by: Megan Jablonski <megjablon@chromium.org>
Cr-Commit-Position: refs/branch-heads/3202@{#68}
Cr-Branched-From: fa6a5d8-refs/heads/master@{#499098}

Author: Megan Jablonski

chrome/android/java/src/org/chromium/chrome/browser/preferences/datareduction/DataReductionStatsPreference.java

@@ -264,7 +264,8 @@ public void onClick(DialogInterface dialog, int which) {
                 };
 
                 new AlertDialog.Builder(getContext(), R.style.AlertDialogTheme)
-                        .setTitle(
+                        .setTitle(R.string.data_reduction_usage_reset_statistics_confirmation_title)
+                        .setMessage(
                                 R.string.data_reduction_usage_reset_statistics_confirmation_dialog)
                         .setPositiveButton(
                                 R.string.data_reduction_usage_reset_statistics_confirmation_button,

chrome/android/java/strings/android_chrome_strings.grd

@@ -1083,8 +1083,11 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_DATA_REDUCTION_USAGE_RESET_STATISTICS_BUTTON" desc="Text to be displayed on the button to reset the Data Reduction statistics.">
         Reset statistics
       </message>
+      <message name="IDS_DATA_REDUCTION_USAGE_RESET_STATISTICS_CONFIRMATION_TITLE" desc="Text to be displayed on the confirmation dialog to reset the Data Reduction statistics.">
+        Reset Data Saver?
+      </message>
       <message name="IDS_DATA_REDUCTION_USAGE_RESET_STATISTICS_CONFIRMATION_DIALOG" desc="Text to be displayed on the confirmation dialog to reset the Data Reduction statistics.">
-        Reset Data Saver? Resetting erases Data Saver history, including the list of visited sites.
+        Resetting erases Data Saver history, including the list of visited sites.
       </message>
       <message name="IDS_DATA_REDUCTION_USAGE_RESET_STATISTICS_CONFIRMATION_BUTTON" desc="Text to be displayed on the confirmation button to proceed with resetting the Data Reduction statistics.">
         Reset