Add FILE_MISSING in PpapiThread::LoadResult for UMA reporting.

content/ppapi_plugin/ppapi_thread.cc

 // Copyright (c) 2012 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 "content/ppapi_plugin/ppapi_thread.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/cpu.h"
 #include "base/debug/crash_logging.h"
+#include "base/file_util.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/rand_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 #include "content/child/browser_font_resource_trusted.h"
 #include "content/child/child_process.h"
@@ skipping 246 matching lines @@
 
   // If the plugin isn't internal then load it from |path|.
   base::ScopedNativeLibrary library;
   if (plugin_entry_points_.initialize_module == NULL) {
     // Load the plugin from the specified library.
     base::NativeLibraryLoadError error;
     library.Reset(base::LoadNativeLibrary(path, &error));
     if (!library.is_valid()) {
       LOG(ERROR) << "Failed to load Pepper module from " << path.value()
                  << " (error: " << error.ToString() << ")";
+      if (!base::PathExists(path)) {
+        ReportLoadResult(path, FILE_MISSING);
+        return;
+      }
       ReportLoadResult(path, LOAD_FAILED);
       // Report detailed reason for load failure.
       ReportLoadErrorCode(path, error);
       return;
     }
 
     // Get the GetInterface function (required).
     plugin_entry_points_.get_interface =
         reinterpret_cast<PP_GetInterface_Func>(
             library.GetFunctionPointer("PPP_GetInterface"));
@@ skipping 243 matching lines @@
       std::string("Plugin.Ppapi") + (is_broker_ ? "Broker" : "Plugin") +
       "LoadErrorCode_" + path.BaseName().MaybeAsASCII();
 
   // For sparse histograms, we can use the macro, as it does not incorporate a
   // static.
   UMA_HISTOGRAM_SPARSE_SLOWLY(histogram_name, error.code);
 #endif
 }
 
 }  // namespace content