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

chrome/common/transport_dib_linux.cc

Index: chrome/common/transport_dib_linux.cc
diff --git a/chrome/common/transport_dib_linux.cc b/chrome/common/transport_dib_linux.cc
old mode 100644
new mode 100755
index be673d908daeb116eaad02777c27f5d6ee91b25c..1037341cb88c9436a7514d52af712c05052cfc78
--- a/chrome/common/transport_dib_linux.cc
+++ b/chrome/common/transport_dib_linux.cc
@@ -11,6 +11,7 @@
 #include "base/logging.h"
 #include "chrome/common/transport_dib.h"
 #include "chrome/common/x11_util.h"
+#include "skia/ext/platform_canvas.h"
 
 // The shmat system call uses this as it's invalid return address
 static void *const kInvalidAddress = (void*) -1;
@@ -80,6 +81,11 @@ TransportDIB* TransportDIB::Map(Handle shmkey) {
   return dib;
 }
 
+skia::PlatformCanvas* TransportDIB::GetPlatformCanvas(int w, int h) {
+  return new skia::PlatformCanvas(w, h, true,
+                                  reinterpret_cast<uint8_t*>(memory()));
+}
+
 void* TransportDIB::memory() const {
   DCHECK_NE(address_, kInvalidAddress);
   return address_;