Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/inspector/InspectorLayerTreeAgent.cpp

Index: Source/core/inspector/InspectorLayerTreeAgent.cpp
diff --git a/Source/core/inspector/InspectorLayerTreeAgent.cpp b/Source/core/inspector/InspectorLayerTreeAgent.cpp
index 061ae33060327b0f26671ba488c60be35a656fb2..a14c7b2a5dc2c82296ac1eacf652dbf438b4c90a 100644
--- a/Source/core/inspector/InspectorLayerTreeAgent.cpp
+++ b/Source/core/inspector/InspectorLayerTreeAgent.cpp
@@ -211,7 +211,7 @@ PassRefPtr<TypeBuilder::LayerTree::Layer> InspectorLayerTreeAgent::buildObjectFo
 int InspectorLayerTreeAgent::idForNode(ErrorString* errorString, Node* node)
 {
     InspectorDOMAgent* domAgent = m_instrumentingAgents->inspectorDOMAgent();
-    
+
     int nodeId = domAgent->boundNodeId(node);
     if (!nodeId)
         nodeId = domAgent->pushNodeToFrontend(errorString, domAgent->boundNodeId(node->document()), node);
@@ -254,7 +254,7 @@ void InspectorLayerTreeAgent::reasonsForCompositingLayer(ErrorString* errorStrin
 
     if (reasonsBitmask & CompositingReasonIFrame)
         compositingReasons->setIFrame(true);
-    
+
     if (reasonsBitmask & CompositingReasonBackfaceVisibilityHidden)
         compositingReasons->setBackfaceVisibilityHidden(true);
 
@@ -299,7 +299,7 @@ void InspectorLayerTreeAgent::reasonsForCompositingLayer(ErrorString* errorStrin
 
     if (reasonsBitmask & CompositingReasonFilterWithCompositedDescendants)
         compositingReasons->setFilterWithCompositedDescendants(true);
-            
+
     if (reasonsBitmask & CompositingReasonBlendingWithCompositedDescendants)
         compositingReasons->setBlendingWithCompositedDescendants(true);