[Android WebView] Lower minidump generation fraction to 1% for Stable

To avoid hitting the cap on the number of uploaded crash reports per day
we lower the fraction of uploaded reports from 100% for Beta to 1% for
Stable.
Note that there should be at least one Beta version with the new lowered
fraction since we do not want to re-push Beta just for this change.

Bug: 800781
Change-Id: I901dc9287e235281cc6892c3aab9b499bfc5f762
Reviewed-on: https://chromium-review.googlesource.com/937401
Reviewed-by: Tobias Sargeant <tobiasjs@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#596}
Cr-Branched-From: bc084a8b5afa3744a74927344e304c02ae54189f-refs/heads/master@{#530369}
diff --git a/android_webview/common/crash_reporter/aw_microdump_crash_reporter.cc b/android_webview/common/crash_reporter/aw_microdump_crash_reporter.cc
index 6e0ccba..d70bb2e 100644
--- a/android_webview/common/crash_reporter/aw_microdump_crash_reporter.cc
+++ b/android_webview/common/crash_reporter/aw_microdump_crash_reporter.cc
@@ -30,8 +30,9 @@
 
 namespace {
 
-// TODO(gsennton) lower the following value before pushing to stable:
-const double minidump_generation_user_fraction = 1.0;
+// Use a value of 1% for WebView Stable to avoid hitting the crash report upload
+// cap.
+const double minidump_generation_user_fraction = 0.01;
 
 // Returns whether the current process should be reporting crashes through
 // minidumps. This function should only be called once per process - the return