Pepper: Expose visible_rect to PPB_VideoDecoder.GetPicture.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index dd55fccbbfe1bc3037ac9b0c0b870c58f5ad10e4..e6224e55c080465abd1c36ca825d650e7762629d 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -50620,6 +50620,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="588532407" label="PPB_Graphics2D;1.1"/>
   <int value="612625164" label="PPB_InputEvent;1.0"/>
   <int value="615811055" label="PPB_Flash_MessageLoop;0.1"/>
+  <int value="617438958" label="PPB_VideoDecoder;1.0"/>
   <int value="629092173" label="PPB_VideoCapture(Dev);0.3"/>
   <int value="630100238" label="PPB_AudioBuffer;0.1"/>
   <int value="631212065" label="PPB_MouseInputEvent;1.0"/>
@@ -50652,6 +50653,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="930528031" label="PPB_OpenGLES2DrawBuffers(Dev);1.0"/>
   <int value="930786862" label="PPB_Flash_Clipboard;5.0"/>
   <int value="941275733" label="PPB_Flash;12.6"/>
+  <int value="943174056" label="PPB_VideoDecoder;0.2"/>
   <int value="944161065" label="PPB_Flash_DRM;1.1"/>
   <int value="946515854" label="PPB_View(Dev);0.1"/>
   <int value="948969343" label="PPB_OpenGLES2;1.0"/>