Make the web plugin proxy tolerant of windowless bitmap memory mapping failures.

These seem to be happening at a low frequency, and can be a result of being out
of memory or using too many GDI resources (I think). By catching the error and
clearing the canvas pointers, we won't crash and will just skip drawing the
plugin.

TEST=none
BUG=25689
Review URL: http://codereview.chromium.org/332033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30201 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 26 insertions, 13 deletions

diff --git a/chrome/plugin/webplugin_proxy.cc b/chrome/plugin/webplugin_proxy.cc
index 4e86173..16fb1ee 100644
--- a/chrome/plugin/webplugin_proxy.cc
+++ b/chrome/plugin/webplugin_proxy.cc
@@ -455,20 +455,33 @@ void WebPluginProxy::UpdateGeometry(
 void WebPluginProxy::SetWindowlessBuffer(
     const TransportDIB::Handle& windowless_buffer,
     const TransportDIB::Handle& background_buffer) {
-  // Create a canvas that will reference the shared bits.
-  windowless_canvas_.reset(new skia::PlatformCanvas(
-      delegate_->GetRect().width(),
-      delegate_->GetRect().height(),
-      true,
-      win_util::GetSectionFromProcess(windowless_buffer,
-                                      channel_->renderer_handle(), false)));
+  // Create a canvas that will reference the shared bits. We have to handle
+  // errors here since we're mapping a large amount of memory that may not fit
+  // in our address space, or go wrong in some other way.
+  windowless_canvas_.reset(new skia::PlatformCanvas);
+  if (!windowless_canvas_->initialize(
+          delegate_->GetRect().width(),
+          delegate_->GetRect().height(),
+          true,
+          win_util::GetSectionFromProcess(windowless_buffer,
+              channel_->renderer_handle(), false))) {
+    windowless_canvas_.reset();
+    background_canvas_.reset();
+    return;
+  }
+
   if (background_buffer) {
-    background_canvas_.reset(new skia::PlatformCanvas(
-        delegate_->GetRect().width(),
-        delegate_->GetRect().height(),
-        true,
-        win_util::GetSectionFromProcess(background_buffer,
-                                        channel_->renderer_handle(), false)));
+    background_canvas_.reset(new skia::PlatformCanvas);
+    if (!background_canvas_->initialize(
+            delegate_->GetRect().width(),
+            delegate_->GetRect().height(),
+            true,
+            win_util::GetSectionFromProcess(background_buffer,
+                channel_->renderer_handle(), false))) {
+      windowless_canvas_.reset();
+      background_canvas_.reset();
+      return;
+    }
   }
 }