Do not call into blink before initialization

content/renderer/render_thread_impl.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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 1400 matching lines @@
                                params.route_id);
 }
 
 void RenderThreadImpl::OnMemoryPressure(
     base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
   base::allocator::ReleaseFreeMemory();
 
   if (memory_pressure_level ==
       base::MemoryPressureListener::MEMORY_PRESSURE_CRITICAL) {
     // Trigger full v8 garbage collection on critical memory notification.
     v8::V8::LowMemoryNotification();

[boliu, 2014/05/16 16:31:15]

Could skip v8 and skia as well if blink is not initialized, but apparently they
can handle these calls without blink init, so kept this fix small.

-    // Clear the image cache.
-    blink::WebImageCache::clear();
+
+    if (webkit_platform_support_) {
+      // Clear the image cache. Do not call into blink if it is not initialized.
+      blink::WebImageCache::clear();
+    }
+
     // Purge Skia font cache, by setting it to 0 and then again to the previous
     // limit.
     size_t font_cache_limit = SkGraphics::SetFontCacheLimit(0);
     SkGraphics::SetFontCacheLimit(font_cache_limit);
   } else {
     // Otherwise trigger a couple of v8 GCs using IdleNotification.
     if (!v8::V8::IdleNotification())
       v8::V8::IdleNotification();
   }
 }
@@ skipping 68 matching lines @@
   hidden_widget_count_--;
 
   if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     return;
   }
 
   ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 }
 
 }  // namespace content