Add some debug URLs to simulate memory pressure

This adds the following debug URLS:
  - chrome://memory-pressure-critical/
  - chrome://memory-pressure-moderate/

These URLs will be useful to improve our memory pressure handlers.

Change-Id: I70e709c57a19661f7c268128e467fd93f87034a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1940748Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
Auto-Submit: Sébastien Marchand <sebmarchand@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721543}

chrome/common/webui_url_constants.cc

@@ -639,6 +639,8 @@ const char* const kChromeDebugURLs[] = {
     content::kChromeUIGpuCrashURL,
     content::kChromeUIGpuHangURL,
     content::kChromeUIMemoryExhaustURL,
+    content::kChromeUIMemoryPressureCriticalURL,
+    content::kChromeUIMemoryPressureModerateURL,
     content::kChromeUIPpapiFlashCrashURL,
     content::kChromeUIPpapiFlashHangURL,
 #if defined(OS_WIN)

content/browser/frame_host/debug_urls.cc

@@ -10,6 +10,7 @@
 #include "base/command_line.h"
 #include "base/debug/asan_invalid_access.h"
 #include "base/debug/profiler.h"
+#include "base/memory/memory_pressure_listener.h"
 #include "base/sanitizer_buildflags.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
@@ -219,6 +220,18 @@ bool HandleDebugURL(const GURL& url,
     return true;
   }
 
+  if (url == kChromeUIMemoryPressureCriticalURL) {
+    base::MemoryPressureListener::NotifyMemoryPressure(
+        base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
+    return true;
+  }
+
+  if (url == kChromeUIMemoryPressureModerateURL) {
+    base::MemoryPressureListener::NotifyMemoryPressure(
+        base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE);
+    return true;
+  }
+
   return false;
 }
 

content/public/common/url_constants.cc

@@ -49,6 +49,10 @@ const char kChromeUIGpuHangURL[] = "chrome://gpuhang/";
 const char kChromeUIHangURL[] = "chrome://hang/";
 const char kChromeUIKillURL[] = "chrome://kill/";
 const char kChromeUIMemoryExhaustURL[] = "chrome://memory-exhaust/";
+const char kChromeUIMemoryPressureCriticalURL[] =
+    "chrome://memory-pressure-critical/";
+const char kChromeUIMemoryPressureModerateURL[] =
+    "chrome://memory-pressure-moderate/";
 const char kChromeUINetworkErrorURL[] = "chrome://network-error/";
 const char kChromeUINetworkErrorsListingURL[] = "chrome://network-errors/";
 const char kChromeUIPpapiFlashCrashURL[] = "chrome://ppapiflashcrash/";

content/public/common/url_constants.h

@@ -62,6 +62,8 @@ CONTENT_EXPORT extern const char kChromeUIGpuHangURL[];
 CONTENT_EXPORT extern const char kChromeUIHangURL[];
 CONTENT_EXPORT extern const char kChromeUIKillURL[];
 CONTENT_EXPORT extern const char kChromeUIMemoryExhaustURL[];
+CONTENT_EXPORT extern const char kChromeUIMemoryPressureCriticalURL[];
+CONTENT_EXPORT extern const char kChromeUIMemoryPressureModerateURL[];
 CONTENT_EXPORT extern const char kChromeUINetworkErrorsListingURL[];
 CONTENT_EXPORT extern const char kChromeUINetworkErrorURL[];
 CONTENT_EXPORT extern const char kChromeUIPpapiFlashCrashURL[];