Catch bad display sizes.

ui/display/fake_display_snapshot.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/display/fake_display_snapshot.h"
 
 #include <inttypes.h>
 
 #include <sstream>
 #include <utility>
@@ skipping 79 matching lines @@
   int height = 0;
   std::string refresh_rate_str;
 
   // Check against regex and extract values.
   if (!RE2::FullMatch(str, "(\\d+)x(\\d+)(?:%(\\d+\\.?\\d*))?", &width, &height,
                       &refresh_rate_str)) {
     LOG(ERROR) << "Invalid display mode string \"" << str << "\"";
     return nullptr;
   }
 
+  if (width <= 0 || height <= 0) {
+    LOG(ERROR) << "Resolution " << width << "x" << height << " is invalid";
+    return nullptr;
+  }
+
   // Refresh rate is optional and will be be 60 if not specified.
   double refresh_rate = 60.0f;
   if (!refresh_rate_str.empty() &&
       !base::StringToDouble(refresh_rate_str, &refresh_rate)) {
     LOG(ERROR) << "Unable to parse display mode \"" << str << "\"";
     return nullptr;
   }
 
   return base::MakeUnique<ui::DisplayMode>(gfx::Size(width, height), false,
                                            static_cast<float>(refresh_rate));
@@ skipping 262 matching lines @@
       " physical_size=%s, type=%s name=\"%s\" modes=(%s)",
       display_id_,
       current_mode_ ? current_mode_->ToString().c_str() : "nullptr",
       native_mode_ ? native_mode_->ToString().c_str() : "nullptr",
       origin_.ToString().c_str(), physical_size_.ToString().c_str(),
       DisplayConnectionTypeString(type_).c_str(), display_name_.c_str(),
       ModeListString(modes_).c_str());
 }
 
 }  // namespace display