[DNT] Added a feature flag to guard dump without crash statements

(cherry picked from commit 622b01b4)

Dump without crashes can be noisy in stable. This flag will enable us to
turn it off and on in different versions of Chrome avoiding extra noises
while being informed about them happening.


Bug: 374365779, 373617224, 375170577
Change-Id: Iee0536c303a571f962b1816667d2fbc67da8ff46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5950247


Reviewed-by: William Liu <liuwilliam@chromium.org>
Reviewed-by: Khushal Sagar <khushalsagar@chromium.org>
Commit-Queue: Baran Erfani <baranerf@google.com>
Cr-Original-Commit-Position: refs/heads/main@{#1372216}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5953097
Cr-Commit-Position: refs/branch-heads/6778@{#791}
Cr-Branched-From: b21671ca-refs/heads/main@{#1368529}

chrome/browser/gesturenav/android/tab_on_back_gesture_handler.cc

@@ -8,6 +8,8 @@
 
 #include "content/public/browser/back_forward_transition_animation_manager.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/content_features.h"
+#include "third_party/blink/public/common/features.h"
 #include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
 #include "ui/gfx/geometry/point_f.h"
@@ -19,6 +21,10 @@ namespace gesturenav {
 
 namespace {
 
+const base::FeatureParam<bool> kDumpWithoutCrashTabOnBackGestureHandler{
+    &blink::features::kBackForwardTransitions,
+    "dump-without-crash-tab-on-back-gesture-handler", false};
+
 using NavDirection =
     content::BackForwardTransitionAnimationManager::NavigationDirection;
 
@@ -42,7 +48,9 @@ void TabOnBackGestureHandler::OnBackStarted(JNIEnv* env,
   // gesture but we see this pattern on multiple devices.
   // See crbug.com/41484247.
   if (is_in_progress_) {
-    base::debug::DumpWithoutCrashing();
+    if (kDumpWithoutCrashTabOnBackGestureHandler.Get()) {
+      base::debug::DumpWithoutCrashing();
+    }
     OnBackCancelled(env);
     CHECK(!is_in_progress_);
   }
@@ -72,19 +80,21 @@ void TabOnBackGestureHandler::OnBackProgressed(JNIEnv* env,
       // however, we see multiple instances with different edge values from
       // start to progress. See crbug.com/370105609.
       started_edge_ != static_cast<ui::BackGestureEventSwipeEdge>(edge)) {
-    std::ostringstream strs;
-    strs << std::fixed << std::setprecision(6) << progress;
-    SCOPED_CRASH_KEY_STRING64("OnBackProgressed", "progress", strs.str());
-    SCOPED_CRASH_KEY_STRING32(
-        "OnBackProgressed", "started edge",
-        started_edge_ == ui::BackGestureEventSwipeEdge::LEFT ? "left"
-                                                             : "right");
-    SCOPED_CRASH_KEY_STRING32("OnBackProgressed", "edge",
-                              edge == 0 ? "left" : "right");
-    SCOPED_CRASH_KEY_BOOL("OnBackProgressed", "forward", forward);
-    SCOPED_CRASH_KEY_BOOL("OnBackProgressed", "is in progress",
-                          is_in_progress_);
-    base::debug::DumpWithoutCrashing();
+    if (kDumpWithoutCrashTabOnBackGestureHandler.Get()) {
+      std::ostringstream strs;
+      strs << std::fixed << std::setprecision(6) << progress;
+      SCOPED_CRASH_KEY_STRING64("OnBackProgressed", "progress", strs.str());
+      SCOPED_CRASH_KEY_STRING32(
+          "OnBackProgressed", "started edge",
+          started_edge_ == ui::BackGestureEventSwipeEdge::LEFT ? "left"
+                                                               : "right");
+      SCOPED_CRASH_KEY_STRING32("OnBackProgressed", "edge",
+                                edge == 0 ? "left" : "right");
+      SCOPED_CRASH_KEY_BOOL("OnBackProgressed", "forward", forward);
+      SCOPED_CRASH_KEY_BOOL("OnBackProgressed", "is in progress",
+                            is_in_progress_);
+      base::debug::DumpWithoutCrashing();
+    }
 
     OnBackCancelled(env);
     CHECK(!is_in_progress_);

content/browser/renderer_host/navigation_transitions/navigation_entry_screenshot_cache.cc

@@ -12,11 +12,17 @@
 #include "content/browser/renderer_host/navigation_transitions/navigation_transition_config.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_entry.h"
+#include "content/public/common/content_features.h"
+#include "third_party/blink/public/common/features.h"
 
 namespace content {
 
 namespace {
 
+const base::FeatureParam<bool> kDumpWithoutCrashNavigationEntryScreenshotCache{
+    &blink::features::kBackForwardTransitions,
+    "dump-without-crash-navigation-entry-screenshot-cache", false};
+
 NavigationEntryScreenshotCache::CompressedCallback& GetTestCallback() {
   static base::NoDestructor<NavigationEntryScreenshotCache::CompressedCallback>
       instance;
@@ -131,9 +137,11 @@ void NavigationEntryScreenshotCache::SetScreenshotInternal(
 
   // Should never capture the last committed entry.
   if (entry == nav_controller_->GetLastCommittedEntry()) {
-    SCOPED_CRASH_KEY_BOOL("dnt", "is_copied_from_embedder",
-                          is_copied_from_embedder);
-    base::debug::DumpWithoutCrashing();
+    if (kDumpWithoutCrashNavigationEntryScreenshotCache.Get()) {
+      SCOPED_CRASH_KEY_BOOL("dnt", "is_copied_from_embedder",
+                            is_copied_from_embedder);
+      base::debug::DumpWithoutCrashing();
+    }
     return;
   }
 
@@ -141,7 +149,9 @@ void NavigationEntryScreenshotCache::SetScreenshotInternal(
   // first (thus not tracked). Impossible to overwrite for a cached entry.
   // TODO(crbug.com/373893401): Find out why this happens.
   if (entry->GetUserData(NavigationEntryScreenshot::kUserDataKey)) {
-    base::debug::DumpWithoutCrashing();
+    if (kDumpWithoutCrashNavigationEntryScreenshotCache.Get()) {
+      base::debug::DumpWithoutCrashing();
+    }
     RemoveScreenshot(entry);
   }