[iOS][DarkMode] Pass user interface style in the crash logs

Bug: 1004397
Change-Id: Ie20fcd85eacbdab152f33fbb5db46611a0c943bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807315Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696886}

ios/chrome/app/chrome_overlay_window.mm

@@ -68,6 +68,8 @@
 - (void)updateBreakpad {
   breakpad_helper::SetCurrentHorizontalSizeClass(
       self.traitCollection.horizontalSizeClass);
+  breakpad_helper::SetCurrentUserInterfaceStyle(
+      self.traitCollection.userInterfaceStyle);
 }
 
 #pragma mark - UITraitEnvironment
@@ -87,6 +89,7 @@
       [self.userInterfaceStyleRecorder
           userInterfaceStyleDidChange:self.traitCollection.userInterfaceStyle];
     }
+    [self updateBreakpad];
   }
 }
 

ios/chrome/browser/crash_report/breakpad_helper.h

@@ -97,6 +97,11 @@ void SetCurrentOrientation(int statusBarOrientation, int deviceOrientation);
 // values from 0 to 2).
 void SetCurrentHorizontalSizeClass(int horizontalSizeClass);
 
+// Sets a key in browser_state dictionary to store the device user interface
+// style. The values are from the UIKit UIUserInterfaceStyle enum (decimal
+// values from 0 to 2).
+void SetCurrentUserInterfaceStyle(int userInterfaceStyle);
+
 // Sets a key in browser_state dictionary to store the count of regular tabs.
 void SetRegularTabCount(int tabCount);
 

ios/chrome/browser/crash_report/breakpad_helper.mm

@@ -57,6 +57,7 @@ NSString* const kGridToVisibleTabAnimation = @"grid_to_visible_tab_animation";
 // These are the values grouped in the user_application_state parameter.
 NSString* const kOrientationState = @"orient";
 NSString* const kHorizontalSizeClass = @"sizeclass";
+NSString* const kUserInterfaceStyle = @"user_interface_style";
 NSString* const kSignedIn = @"signIn";
 NSString* const kIsShowingPDF = @"pdf";
 NSString* const kVideoPlaying = @"avplay";
@@ -319,6 +320,12 @@ void SetCurrentHorizontalSizeClass(int horizontalSizeClass) {
       withValue:horizontalSizeClass];
 }
 
+void SetCurrentUserInterfaceStyle(int userInterfaceStyle) {
+  [[CrashReportUserApplicationState sharedInstance]
+       setValue:kUserInterfaceStyle
+      withValue:userInterfaceStyle];
+}
+
 void SetCurrentlySignedIn(bool signedIn) {
   if (signedIn) {
     [[CrashReportUserApplicationState sharedInstance] setValue:kSignedIn

ios/chrome/browser/crash_report/breakpad_helper_unittest.mm

@@ -60,6 +60,7 @@ TEST_F(BreakpadHelperTest, CrashReportUserApplicationStateAllKeys) {
   // single breakpad record.
   breakpad_helper::SetCurrentOrientation(3, 7);
   breakpad_helper::SetCurrentHorizontalSizeClass(2);
+  breakpad_helper::SetCurrentUserInterfaceStyle(2);
   breakpad_helper::SetRegularTabCount(999);
   breakpad_helper::SetIncognitoTabCount(999);
   breakpad_helper::SetDestroyingAndRebuildingIncognitoBrowserState(true);