Simplify the text in the external protocol confirmation dialog.

chrome/browser/ui/cocoa/external_protocol_dialog.mm

Index: chrome/browser/ui/cocoa/external_protocol_dialog.mm
diff --git a/chrome/browser/ui/cocoa/external_protocol_dialog.mm b/chrome/browser/ui/cocoa/external_protocol_dialog.mm
index 73db5415207e2c4b496df794a30e8d20d21de58c..531cb0eb5aa457654f1e61a99e2a23c42add2a99 100644
--- a/chrome/browser/ui/cocoa/external_protocol_dialog.mm
+++ b/chrome/browser/ui/cocoa/external_protocol_dialog.mm
@@ -6,6 +6,7 @@
 
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
+#include "base/metrics/sparse_histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
@@ -61,40 +62,20 @@ void ExternalProtocolHandler::RunExternalProtocolDialog(
   alert_ = [[NSAlert alloc] init];
 
   [alert_ setMessageText:
-      l10n_util::GetNSStringWithFixup(IDS_EXTERNAL_PROTOCOL_TITLE)];
+      l10n_util::GetNSStringFWithFixup(IDS_EXTERNAL_PROTOCOL_TITLE, appName)];
 
-  NSButton* allowButton = [alert_ addButtonWithTitle:
-      l10n_util::GetNSStringWithFixup(IDS_EXTERNAL_PROTOCOL_OK_BUTTON_TEXT)];
+  NSButton* allowButton = [alert_
+      addButtonWithTitle:l10n_util::GetNSStringFWithFixup(
+                   IDS_EXTERNAL_PROTOCOL_OK_BUTTON_TEXT, appName)];
   [allowButton setKeyEquivalent:@""];  // disallow as default
   [alert_ addButtonWithTitle:
       l10n_util::GetNSStringWithFixup(
         IDS_EXTERNAL_PROTOCOL_CANCEL_BUTTON_TEXT)];
 
-  const size_t kMaxUrlWithoutSchemeSize = 256;
-  base::string16 elided_url_without_scheme;
-  gfx::ElideString(base::ASCIIToUTF16(url_.possibly_invalid_spec()),
-                  kMaxUrlWithoutSchemeSize, &elided_url_without_scheme);
-
-  NSString* urlString = l10n_util::GetNSStringFWithFixup(
-      IDS_EXTERNAL_PROTOCOL_INFORMATION,
-      base::ASCIIToUTF16(url_.scheme() + ":"),
-      elided_url_without_scheme);
-  NSString* appString = l10n_util::GetNSStringFWithFixup(
-      IDS_EXTERNAL_PROTOCOL_APPLICATION_TO_LAUNCH,
-      appName);
-  NSString* warningString =
-      l10n_util::GetNSStringWithFixup(IDS_EXTERNAL_PROTOCOL_WARNING);
-  NSString* informativeText =
-      [NSString stringWithFormat:@"%@\n\n%@\n\n%@",
-                                 urlString,
-                                 appString,
-                                 warningString];
-
-  [alert_ setInformativeText:informativeText];
-
   [alert_ setShowsSuppressionButton:YES];
-  [[alert_ suppressionButton] setTitle:
-      l10n_util::GetNSStringWithFixup(IDS_EXTERNAL_PROTOCOL_CHECKBOX_TEXT)];
+  [[alert_ suppressionButton]
+      setTitle:l10n_util::GetNSStringFWithFixup(
+                   IDS_EXTERNAL_PROTOCOL_CHECKBOX_TEXT, appName)];
 
   [alert_ beginSheetModalForWindow:nil  // nil here makes it app-modal
                      modalDelegate:self
@@ -127,8 +108,14 @@ void ExternalProtocolHandler::RunExternalProtocolDialog(
   }
 
   // Set the "don't warn me again" info.
-  if ([[alert_ suppressionButton] state] == NSOnState)
+  if ([[alert_ suppressionButton] state] == NSOnState) {
     ExternalProtocolHandler::SetBlockState(url_.scheme(), blockState);
+    UMA_HISTOGRAM_SPARSE_SLOWLY(
+        ExternalProtocolHandler::kRememberCheckedHistogram, 1);
+  } else {
+    UMA_HISTOGRAM_SPARSE_SLOWLY(
+        ExternalProtocolHandler::kRememberCheckedHistogram, 0);
+  }
 
   if (blockState == ExternalProtocolHandler::DONT_BLOCK) {
     UMA_HISTOGRAM_LONG_TIMES("clickjacking.launch_url",