Revert of Add support for more ASAN errors generation to chrome://crash/...

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index c28b72da79b414073980710da41d53c7e2c55a58..a088661633d144135611d95f83b8200077448e13 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -202,31 +202,6 @@
   *zero = 0;
 }
 
-#if defined(SYZYASAN)
-// This code triggers a C4509 warning as we're using an object with a destructor
-// in a function with SEH. We can safely disable this as no exception will
-// actually be thrown.
-#pragma warning(push)
-#pragma warning(disable: 4509)
-NOINLINE static void CorruptMemoryBlock() {
-  // NOTE(sebmarchand): We intentionally corrupt a memory block here in order to
-  //     trigger an Address Sanitizer (ASAN) error report.
-  static const int kArraySize = 5;
-  scoped_ptr<int[]> array(new int[kArraySize]);
-  // Encapsulate the invalid memory access into a try-catch statement to prevent
-  // this function from being instrumented. This way the underflow won't be
-  // detected but the corruption will (as the allocator will still be hooked).
-  __try {
-    int dummy = array[-1]--;
-    // Make sure the assignments to the dummy value aren't optimized away.
-    base::debug::Alias(&array);
-  } __except (EXCEPTION_EXECUTE_HANDLER) {
-    return;
-  }
-}
-#pragma warning(pop)
-#endif
-
 #if defined(ADDRESS_SANITIZER) || defined(SYZYASAN)
 NOINLINE static void MaybeTriggerAsanError(const GURL& url) {
   // NOTE(rogerm): We intentionally perform an invalid heap access here in
@@ -235,9 +210,6 @@
   static const char kHeapOverflow[] = "/heap-overflow";
   static const char kHeapUnderflow[] = "/heap-underflow";
   static const char kUseAfterFree[] = "/use-after-free";
-#if defined(SYZYASAN)
-  static const char kCorruptHeapBlock[] = "/corrupt-heap-block";
-#endif
   static const int kArraySize = 5;
 
   if (!url.DomainIs(kCrashDomain, sizeof(kCrashDomain) - 1))
@@ -257,10 +229,6 @@
     int* dangling = array.get();
     array.reset();
     dummy = dangling[kArraySize / 2];
-#if defined(SYZYASAN)
-  } else if (crash_type == kCorruptHeapBlock) {
-    CorruptMemoryBlock();
-#endif
   }
 
   // Make sure the assignments to the dummy value aren't optimized away.