Adds kind-of-live thumbnail generation for a potential tab switcher.

chrome/common/transport_dib_win.cc

Index: chrome/common/transport_dib_win.cc
diff --git a/chrome/common/transport_dib_win.cc b/chrome/common/transport_dib_win.cc
old mode 100644
new mode 100755
index 49cb755d3821691869dcb564f52953679097f1aa..41fe9250b4dbcfed4b89e92e78ddcb0b414c0c2b
--- a/chrome/common/transport_dib_win.cc
+++ b/chrome/common/transport_dib_win.cc
@@ -8,6 +8,7 @@
 #include "base/logging.h"
 #include "base/sys_info.h"
 #include "chrome/common/transport_dib.h"
+#include "skia/ext/platform_canvas.h"
 
 TransportDIB::TransportDIB() {
 }
@@ -59,6 +60,10 @@ TransportDIB* TransportDIB::Map(TransportDIB::Handle handle) {
   return dib;
 }
 
+skia::PlatformCanvas* TransportDIB::GetPlatformCanvas(int w, int h) {
+  return new skia::PlatformCanvas(w, h, true, handle());
+}
+
 void* TransportDIB::memory() const {
   return shared_memory_.memory();
 }