Fix file upload on Qt 4.8.

Code was added to WebKit to detect whether the click event on the file
input element is triggered by user action or by a script. If it's by a
script, the event is ignored. This prevented us from simulating a click
on the element.

This fix just patches WebKit to remove the detection.

The relevant WebKit commit is:

  931870c11b

The associated WebKit bug is:

  https://bugs.webkit.org/show_bug.cgi?id=47593

Our bug is:

  http://code.google.com/p/phantomjs/issues/detail?id=307&q=upload

deploy/build-linux.sh

@@ -71,6 +71,7 @@ if [ $QT_VERSION = 4.8 ] ; then
     patch -p1 < ../qt48_enable_debugger.patch
     patch -p1 < ../qt48_fix_inspector.patch
     patch -p1 < ../qt48_headless_and_pdf_fixes.patch
+    patch -p1 < ../qt48_enable_file_input_click.patch
   # Build in lighthose mode for an x-less build
     if [ "$2" = "--headless" ] ; then
         echo "Building 4.8 in qpa headless mode"

deploy/build-mac.sh

@@ -36,6 +36,7 @@ mv qt-everywhere-opensource-src-$QT_VERSION Qt-$QT_VERSION
 cd $QT_FOLDER
 patch configure ../allow-static-qtwebkit.patch
 patch -p1 < ../qapplication_skip_qtmenu.patch
+patch -p1 < ../qt48_enable_file_input_click.patch
 
 rm -rf src/3rdparty/webkit/Source/WebKit/qt/tests
 

deploy/qt48_enable_file_input_click.patch

@@ -0,0 +1,14 @@
+diff --git a/src/3rdparty/webkit/Source/WebCore/rendering/RenderFileUploadControl.cpp b/src/3rdparty/webkit/Source/WebCore/rendering/RenderFileUploadControl.cpp
+index 87f6ff1..7d8f2d1 100644
+--- a/src/3rdparty/webkit/Source/WebCore/rendering/RenderFileUploadControl.cpp
++++ b/src/3rdparty/webkit/Source/WebCore/rendering/RenderFileUploadControl.cpp
+@@ -130,9 +130,6 @@ void RenderFileUploadControl::chooseIconForFiles(FileChooser* chooser, const Vec
+ 
+ void RenderFileUploadControl::click()
+ {
+-    // Requires a user gesture to open the file dialog.
+-    if (!frame() || !frame()->loader()->isProcessingUserGesture())
+-        return;
+     if (Chrome* chromePointer = chrome())
+         chromePointer->runOpenPanel(frame(), m_fileChooser);
+ }